tbyron

Thank you very much. Will resolve with them.

Solution, sort of, do these in order:
– Deactivate both Jetpack and Gutenberg.
– Reactivate Gutenberg. Confirm it works again.
– Reactivate Jetpack.

For the moment, everything seems to be working again.

Notes:
– Jetpack updated 7 days ago to 7.5.2
– Gutenberg updated to 6.1 only two days ago…the problem presented itself when Gutenberg updated.

I can confirm the blank page here using 5.2.2 along with 6.1. Reverting to 6.0 fixes it.

Really? How odd. Just tried Twenty Seventeen 2.2 with the same/current versions of Encyclopedia Lite & WordPress. Nothing. Actually, none of the Enyclopedia widgets are working.

If I delete and reinstall the plugin, will the posts be preserved and then retain their content once reactivated?

Disregard this, resolved this error.