Error Codes
Here are some explanations for error codes you may encounter. Please let us know if you think you encountered a bug. The best way to report an issue is via out issuetracker at redmine
403 - Forbidden
You are trying to access a page that you don’t have permissions to access. This can happen if you try to edit an entity as user with read only status. The user interface shouldn’t provide you with links to sites that are restricted for your user, so maybe you used an obsolete link or bookmark. If this happens regularly, please report the issue.
404 - File not found
The site you requested cannot be found. Maybe you used an obsolete link or bookmark.
418 - I’m a teapot
This message is displayed if you tried to access an entity with an ID that doesn’t exist (anymore). Maybe you used an obsolete link or bookmark.