TypeError: Cannot read property ‘reusableBlocks’ of undefined

Upgraded to 5.7 and now I cannot create or edit any posts with the block editor. As a workaround I’ve had to reinstall the classic editor plugin so my users can create and edit posts.

Whenever I attempt to create or edit anything with the block editor (posts, reusable blocks, or anything else at all that uses the block editor), the browser page goes blank. When I check the browser dev console, I don’t see any resources failing to load, but I do see the following three errors in my console:

data.min.js?ver=943087ae96d075f126df689839bb96b9:2 
An error occurred while running 'mapSelect': Cannot read property 'canUser' of null
Ge @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
Wc @ editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12
(anonymous) @ editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12
we @ react-dom.min.js?ver=16.13.1:84
zj @ react-dom.min.js?ver=16.13.1:226
Th @ react-dom.min.js?ver=16.13.1:152
tj @ react-dom.min.js?ver=16.13.1:152
Te @ react-dom.min.js?ver=16.13.1:146
(anonymous) @ react-dom.min.js?ver=16.13.1:61
unstable_runWithPriority @ react.min.js?ver=16.13.1:25
Da @ react-dom.min.js?ver=16.13.1:60
Pg @ react-dom.min.js?ver=16.13.1:61
ha @ react-dom.min.js?ver=16.13.1:60
Ja @ react-dom.min.js?ver=16.13.1:224
ch @ react-dom.min.js?ver=16.13.1:93
e @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
t @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
p @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
dispatch @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
n @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
Promise.then (async)
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
n @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
Promise.then (async)
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.iterator @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.iterator @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
oe @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
ne @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
setTimeout (async)
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
f @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
s @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ edit-post.min.js?ver=f74dc8b595fc8850a69a044ff78d1e86:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
s @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
Ge @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
we @ react-dom.min.js?ver=16.13.1:84
zj @ react-dom.min.js?ver=16.13.1:226
Th @ react-dom.min.js?ver=16.13.1:152
tj @ react-dom.min.js?ver=16.13.1:152
Te @ react-dom.min.js?ver=16.13.1:146
Ja @ react-dom.min.js?ver=16.13.1:224
md @ react-dom.min.js?ver=16.13.1:173
(anonymous) @ react-dom.min.js?ver=16.13.1:175
Rh @ react-dom.min.js?ver=16.13.1:147
nd @ react-dom.min.js?ver=16.13.1:175
I.render @ react-dom.min.js?ver=16.13.1:238
hi @ edit-post.min.js?ver=f74dc8b595fc8850a69a044ff78d1e86:2
(anonymous) @ post.php?post=20363&action=edit&classic-editor__forget:349
Show 77 more frames

react-dom.min.js?ver=16.13.1:125 
TypeError: Cannot read property 'reusableBlocks' of undefined
    at Wc (editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12)
    at editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12
    at we (react-dom.min.js?ver=16.13.1:84)
    at zj (react-dom.min.js?ver=16.13.1:226)
    at Th (react-dom.min.js?ver=16.13.1:152)
    at tj (react-dom.min.js?ver=16.13.1:152)
    at Te (react-dom.min.js?ver=16.13.1:146)
    at react-dom.min.js?ver=16.13.1:61
    at unstable_runWithPriority (react.min.js?ver=16.13.1:25)
    at Da (react-dom.min.js?ver=16.13.1:60)
Me @ react-dom.min.js?ver=16.13.1:125
Ih.c.callback @ react-dom.min.js?ver=16.13.1:138
Wg @ react-dom.min.js?ver=16.13.1:67
oj @ react-dom.min.js?ver=16.13.1:127
Aj @ react-dom.min.js?ver=16.13.1:160
unstable_runWithPriority @ react.min.js?ver=16.13.1:25
Da @ react-dom.min.js?ver=16.13.1:60
ab @ react-dom.min.js?ver=16.13.1:154
Te @ react-dom.min.js?ver=16.13.1:146
(anonymous) @ react-dom.min.js?ver=16.13.1:61
unstable_runWithPriority @ react.min.js?ver=16.13.1:25
Da @ react-dom.min.js?ver=16.13.1:60
Pg @ react-dom.min.js?ver=16.13.1:61
ha @ react-dom.min.js?ver=16.13.1:60
Ja @ react-dom.min.js?ver=16.13.1:224
ch @ react-dom.min.js?ver=16.13.1:93
e @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
t @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
p @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
dispatch @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
n @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
Promise.then (async)
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
n @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.any @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
Promise.then (async)
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.iterator @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
r.iterator @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
e @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
c @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
t @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ redux-routine.min.js?ver=284288e957394d2097c6fbe95625e2fb:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
oe @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
ne @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
setTimeout (async)
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
tryCatch @ wp-polyfill.min.js?ver=7.4.4:1
invoke @ wp-polyfill.min.js?ver=7.4.4:1
t.<computed> @ wp-polyfill.min.js?ver=7.4.4:1
n @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
f @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
s @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
c @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ edit-post.min.js?ver=f74dc8b595fc8850a69a044ff78d1e86:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
s @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
Ge @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
(anonymous) @ data.min.js?ver=943087ae96d075f126df689839bb96b9:2
we @ react-dom.min.js?ver=16.13.1:84
zj @ react-dom.min.js?ver=16.13.1:226
Th @ react-dom.min.js?ver=16.13.1:152
tj @ react-dom.min.js?ver=16.13.1:152
Te @ react-dom.min.js?ver=16.13.1:146
Ja @ react-dom.min.js?ver=16.13.1:224
md @ react-dom.min.js?ver=16.13.1:173
(anonymous) @ react-dom.min.js?ver=16.13.1:175
Rh @ react-dom.min.js?ver=16.13.1:147
nd @ react-dom.min.js?ver=16.13.1:175
I.render @ react-dom.min.js?ver=16.13.1:238
hi @ edit-post.min.js?ver=f74dc8b595fc8850a69a044ff78d1e86:2
(anonymous) @ post.php?post=20363&action=edit&classic-editor__forget:349
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editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12 Uncaught (in promise) TypeError: Cannot read property 'reusableBlocks' of undefined
    at Wc (editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12)
    at editor.min.js?ver=5210dd1dd91e796c406f0aacfa4b9620:12
    at we (react-dom.min.js?ver=16.13.1:84)
    at zj (react-dom.min.js?ver=16.13.1:226)
    at Th (react-dom.min.js?ver=16.13.1:152)
    at tj (react-dom.min.js?ver=16.13.1:152)
    at Te (react-dom.min.js?ver=16.13.1:146)
    at react-dom.min.js?ver=16.13.1:61
    at unstable_runWithPriority (react.min.js?ver=16.13.1:25)
    at Da (react-dom.min.js?ver=16.13.1:60)
Wc	@	editor.min.js?ver=52…406f0aacfa4b9620:12
(anonymous)	@	editor.min.js?ver=52…406f0aacfa4b9620:12
we	@	react-dom.min.js?ver=16.13.1:84
zj	@	react-dom.min.js?ver=16.13.1:226
Th	@	react-dom.min.js?ver=16.13.1:152
tj	@	react-dom.min.js?ver=16.13.1:152
Te	@	react-dom.min.js?ver=16.13.1:146
(anonymous)	@	react-dom.min.js?ver=16.13.1:61
unstable_runWithPriority	@	react.min.js?ver=16.13.1:25
Da	@	react-dom.min.js?ver=16.13.1:60
Pg	@	react-dom.min.js?ver=16.13.1:61
ha	@	react-dom.min.js?ver=16.13.1:60
Ja	@	react-dom.min.js?ver=16.13.1:224
ch	@	react-dom.min.js?ver=16.13.1:93
e	@	data.min.js?ver=9430…126df689839bb96b9:2
t	@	data.min.js?ver=9430…126df689839bb96b9:2
(anonymous)	@	data.min.js?ver=9430…126df689839bb96b9:2
p	@	data.min.js?ver=9430…126df689839bb96b9:2
(anonymous)	@	redux-routine.min.js…097c6fbe95625e2fb:2
(anonymous)	@	data.min.js?ver=9430…126df689839bb96b9:2
(anonymous)	@	data.min.js?ver=9430…126df689839bb96b9:2
dispatch	@	data.min.js?ver=9430…126df689839bb96b9:2
n	@	redux-routine.min.js…097c6fbe95625e2fb:2
(anonymous)	@	redux-routine.min.js…097c6fbe95625e2fb:2
e	@	redux-routine.min.js…097c6fbe95625e2fb:2
(anonymous)	@	redux-routine.min.js…097c6fbe95625e2fb:2
Promise.then (async)		
n	@	data.min.js?ver=9430…126df689839bb96b9:2
c	@	data.min.js?ver=9430…126df689839bb96b9:2
(anonymous)	@	data.min.js?ver=9430…126df689839bb96b9:2
(anonymous)	@	data.min.js?ver=9430…126df689839bb96b9:2
Show 32 more frames

Screenshot of the collapsed errors: https://i.imgur.com/LKpwgvi.png

There are no relevant errors in the web server log or php log files.

Site health check shows no relevant issues: https://i.imgur.com/4USskOH.png

I have redownloaded and installed the WP core files. No change in problem behavior.

I have disabled all noncritical plugins. No change in problem behavior.

Have also rebooted the host just to make sure this isn’t some weird transient issue, and the problem behavior persists.

As noted at the top, I have reinstalled the classic editor plugin so that my users can create posts while I troubleshoot, so I’m not down, but any advice or assistance on what to troubleshoot next would be appreciated. Thank you ??

(Adding the two image links has gotten this post marked as spam. Sorry. Not sure how else to share the relevant info.)