Anonymouse Pad creation not working: {"error":"BACKEND.ERROR.PERMISSION.UNEXPECTED"}

Description of the bug

When checking the 'Anonymous pads' in the admin panel the standard Etherpad landing page shows up but it is not possible to create a pad. After clicking create pad the following JSON response appears: {"error":"BACKEND.ERROR.PERMISSION.UNEXPECTED"}

What should be the normal behavior?

A new anonymous pad should be created and the regular pad view without mypads interface should show up.

What is the current behavior?

{"error":"BACKEND.ERROR.PERMISSION.UNEXPECTED"} is shown, if the padId is not already registered via mypads. HTTP Code: 401 Unauthorized

Do you have a hint about the bug resolution?

What is your version of Etherpad?

1.8.17 and tried 1.8.14 . node versions : v16.14.2 and v14.19.0

What is your version of MyPads?

1.7.22

What is your authentication method?

LDAP

Please, provide some logs if relevant

dont know if relevant Etherpad node server throws log: [ERROR] console - { inspect: [Function: inspect] }