When add a custom icon to the theme configuration, then the error on log
Uncaught PHP Exception Drupal\\Component\\Plugin\\Exception\\PluginNotFoundException: "The "file_validate_extensions" plugin does not exist. Valid plugin IDs for Drupal\\Core\\Validation\\ConstraintManager are: Callback, Blank, NotBlank, Email, Choice, Image,....
On theme configuration, try to set a custom icon
The function is deprecated in Drupal 11: https://api.drupal.org/api/drupal/core%21modules%21file%21file.module/fu...
Need to use the 'file.validator' service instead
https://www.drupal.org/node/3363700 →
Change in the file
includes/theme-settings.inc
at line # 1272
from
$validators = ['file_validate_extensions' => [implode(' ', $supported_extensions)]];
to
$validators = ['FileExtension' => [implode(' ', $supported_extensions)]];
Active
2.12
Code
I have reviewed the changes and since file_valid_extensions is deprecated these changes will solve the issue.
Thus moving this to RTBC!