non-existent permissions

I am unable to reproduce can you share more info ?

After uninstalling Workflow, I was able to save permissions without the error.

A list of installed modules (after disabling Workflow, but all else the same) is https://www.drupal.org/files/issues/2023-09-01/pm-list.txt →

and the error message is https://www.drupal.org/files/issues/2023-09-01/err-perms.txt →

I see some other modules reporting this same error - it seems it might be due to a core change.

Per https://www.drupal.org/project/field_permissions/issues/3342508#comment-... 🐛 RuntimeException: Adding non-existent permissions to a role is not allowed. Needs review ,

Starting with Drupal 9.3.0, all permissions in a user role must be defined in a module.permissions.yml file or a permissions callback. Other permissions are now considered invalid. This includes permissions from uninstalled modules, permissions that depend on configuration that has been removed (such as a content type), and permissions of obscure origin.

In Drupal 9.3.0 or later, saving a role with an invalid permission will trigger a E_USER_DEPRECATED error. In Drupal 10, it will throw a runtime exception.

Thanks,
The problem is fixed and documented here: 🐛 RuntimeException: Adding non-existent permissions to a role is not allowed Fixed