What is the problem?

When turning on or off the auto-reveal via the dialog, if the API request to set the global preferences returns an error we only display the error code in the UI, such as notloggedin or readonly. A user might not know what these mean.

Steps to reproduce problem

1. You need a test environment with CheckUser and a test user in the checkuser group
2. Login as the user in the checkuser group
3. Do something that will prevent you from setting your global preferences, for example
   1. Keep the current tab open and in another tab logout
   2. In your LocalSettings.php set $wgReadOnly = true;
4. Open the tools menu and click IP Auto-reveal
5. Fill the form in as necessary and submit

Expected behaviour: An informative error message telling you what is wrong
Observed behaviour: Just a one word error message

Environment

Wiki(s): local docker CheckUser 2.5 (11198de) 15:53, 27 October 2025.

Screenshots