The Layout Builder UI for a bundle's "Manage Display" creates a sample entity for arranging the fields.
This is stored in tempstore, which has an expiry of 7 days.
However, if the sample entity has a file or image field, the sample file is stored as a temporary file, which has an expiry of 6 hours.
After 6 hours but before 7 days have passed, any action in the Layout Builder UI will cause the following
Call to a member function getValue() on null in Drupal\file\Plugin\Validation\Constraint\FileValidationConstraintValidator->validate() (line 18 of /srv/bindings/9c9fb46000b0451caf842668d3816489/code/core/modules/file/src/Plugin/Validation/Constraint/FileValidationConstraintValidator.php)
TBD
Write tests
Figure out a solution
N/A
N/A
N/A
Needs work
11.0 🔥
Last updated
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
Blocks and Layouts Initiative. See the #2811175 Add layouts to Drupal issue.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I almost think this could be closed now that the other issue has been fixed. We no longer get a WSOD and the "Placeholder for the "Image" field" fallback text feels perfectly acceptable to me considering this is somewhat rare and had no updates for 5+ years?