Is your feature request related to a problem? Please describe.
the function getMessageFromApolloError returns wrong error messages to the user. As a user I want to see correct error messages.

Describe the solution you'd like
The getMessageFromApolloError return the correct error message

Additional context

• Go to ProjectSettingsController.tsx and removee the if case that is return an "missing rights" section.
• Now login as bayern project admin
• open http://localhost:3000/project
• create a token
• see the error message "Server nicht erreichbar."
  the backend return the correct error code "403 Forbidden". The user should get an appropriate information about the error that occured. This should not only happen for this example but everywhere.