I solved this issue using the suggestions by @diqidoq #5 found on this issue:
https://www.drupal.org/project/drupal/issues/3410301
🐛
Deprecate system.performance stale_file_threshold
Fixed
Related discussion on Slack:
https://drupal.slack.com/archives/C1BMUQ9U6/p1703153827992839
#2 worked for me, thank you! Drupal 10.1.7, entity_print 8.x-2.13
I experienced the same issue after upgrading from 9.5.10 to 9.5.11. I followed the suggestion mentioned by @aasarava #12. Using Drush, uninstalling field_ui and re-enabling it removed the error.
Thank you Nicholas, for pointing me in the right direction. I have a custom theme based on Classy that uses the Bootstrap 4 library. I am adding Bootstrap text formatting and typography classes to the styles drop down. I did not differentiate between inline styles and styles that need to be applied to a block element.
Inline styles:
cite|Cite
code|Code
var|Variable
Block styles:
small.text-muted|Text Muted
h1.display-1|H1 Display 1
footer.blockquote-footer|Blockquote Footer
Thanks again.
On Drupal 8.9.1. I have patch #57 from #5 applied. Attempting to add the style text-muted|Faded secondary text to custom styles results in the following error:
The provided list of styles is syntactically incorrect.
Am I missing something?