Hello,
I have the same problem with indexable-term-archive-presentation.php and yoast-head-rest-field.php on line 122 with my 4 custom tax.
All plugins is update and my WordPress version too.
I have try lot of thinks like :
– Remove Yoast and tables in database then reinstall
– Use Yoast Test Helper for reset indexable
Result…I have always PHP errors.
But, if I create a new taxonomy in PHP with a new slug (and remove my 4 older taxonomies), the errors disappears.
I think we have create taxonomies with bad version of Yoast (maybe v14.0.1) and my taxonomies have problem in database.
How to resolve this ? Thanks