When users try copying or moving pages into section of the content tree where they don't have the necessary permissions, the right-hand panel displays:

Received an error from the server An error occured Object reference not set to an instance of an object...

Chrome console shows angular post error: /umbraco/backoffice/UmbracoApi/Content/PostCopy 500 (Internal Server Error)

The users are prevented from carrying out the copy or move as per design but the error reporting is rather inelegant! Is this the standard error response?

(Umbraco 7.4.2)

Edit: OK, the right-hand panel error only appear if running in 'debug' mode, the cleaner, red error block appearing otherwise! From a user's perspective, the error message is still a bit cryptic!

Edit: Better in 7.5