Invalid screen value: 6

Our site uses the photonic gallery and relies heavily on it for our photography. Since a recent update, in the classic editor users get the error Invalid screen value: 6.

This is resolved by switching temporarily to the block editor, but since a lot of our users rely on the classic editor we really would like to get this issue fixed.

We have quite a few of extra plugins installed;
add admin css
adjust admin categories
ads.txt manager
advanced custom fields
akismet anti spam
classic editor
code snippets
cookieyes
ewww image optimizer
google analytics
insert php code snippet
justified gallery
pods
publish press (athors, capabilities,checklists)
redis object cache
relevanssi
shortcodes ultimate
wpforms
wp super cache
yoast seo