The langcode is missing in private_message.settings.
It is needed because the config file contains translatable keys (see type: label in schema.yml)
PS: This is true for both 4.x and 3.x
Related change record (introduced in 10.3.0): https://www.drupal.org/node/3427629 →
- Install private_message and config_inspector
- Run: drush config:inspect --only-error --detail --list-constraints
- Output:
private_message.settings Correct 78% 1 errors ValidKeys: '<infer>'
LangcodeRequiredIfTranslatableValues: nullAdd missing langcode: en in private_message.settings + add post update hook.
do it
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4.0
Code