A warning is triggered when accessing an array offset on a null value in the Office Hours module. The error occurs in the OfficeHoursItemList->getFieldRows() method, located in the OfficeHoursFormatterTrait.php file.
1. Install the Office Hours module
2. Navigate to a page that displays office hours or triggers the formatter trait
3. Check the logs for the following warning:
Warning: Trying to access array offset on value of type null in Drupal\office_hours\Plugin\Field\FieldType\OfficeHoursItemList->getFieldRows() (line 115 of /modules/contrib/office_hours/src/OfficeHoursFormatterTrait.php)
Make merge request based on attached patch
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Active
1.22
Code
Thanks for the report.
Given your patch and your error message, I think you used a dev-version.
In the 1.22 version, I get a similar error
Error: Call to a member function getRows() on null in OfficeHoursItemList->getRows() (line 119 ofOfficeHoursItemList.php).
So, I added another solution. And raised the error to major since you get a WSOD in a simple case: an entity with empty office_hours.