When submitting the config form for a text format I get the following error:
AssertionError: Schema errors: Array ( [editor.editor.id_does_not_matter:settings.plugins.ckeditor5_mentions_mention.dropdown_limit] => variable type is string but applied schema class is Drupal\Core\TypedData\Plugin\DataType\IntegerData [editor.editor.id_does_not_matter:settings.plugins.ckeditor5_mentions_mention.mention_feeds_enabled.select] => variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\StringData ) in assert() (line 729 of core/modules/ckeditor5/src/Plugin/Editor/CKEditor5.php).
Enable the module, navigate to a text format and click save.
Fix the values saved in Mention::submitConfigurationForm
to match the schema.
Needs review
1.1
Code