After a d7 to d10 migration, I'm getting this message each time I clean caches (drush cr) or on an operation where EntityFieldManager.php is called:
foreach() argument must be of type array|object, null given EntityFieldManager.php:539
Digging in EntityFieldManager.php it appears that the message entity_type_id is in cause.
$bundle_field_maps = $this->keyValueFactory->get('entity.definitions.bundle_field_map')->getAll();
foreach ($bundle_field_maps as $entity_type_id => $bundle_field_map) {
(line 539) foreach ($bundle_field_map as $field_name => $map_entry) {
Is there something wrong in entity.definitions ? apparently $bundle_field_maps ['message'] is empty.
I deleted all my old message templates coming from d7, I uninstalled message and message_examples, then I reinstalled them but the error appears again. No idea what is producing it.
Active
1.0
Code
Finally, there was an other entry remaining in the key_value table:
entity.definitions.bundle_field_map entity_message N;
Deleting it seems the error has gone.