After Setting the Fields to encrypt the Form Breaks

After importing my encryption-relevant configuration on a unencrypted database for testing, I was getting an Ajax console error:

"
An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /admin/config/system/field-encrypt/entity-types?ajax_form=1
StatusText: OK
ResponseText: 
Warning:  array_flip(): Can only flip string and integer values, entry skipped in /var/www/html/docroot/core/lib/Drupal/Core/Entity/EntityStorageBase.php on line 278
The website encountered an unexpected error. Please try again later."

This prevented me from altering the entity field encryption configuration.

I've applied the patch and tested again on Drupal 10.1.6 and I no longer get this error.

I propose moving to RTBC.

Created an MR. Let's run the tests against this.

Looks like the types are wrong somewhere, causing a phpstan failure. This needs to be fixed before commit.

Also I think we should be filtering in the query and not looping over everything after - see comment on MR.

Automatically closed - issue fixed for 2 weeks with no activity.