When a user who has the access to this screen tries to open it, it fails to load with this error. I have tested this with another user account with the same permissions, etc and I can access the screen and do a search. 
I have tried going to this screen with debug console on with the user account that fails to load it, and nothing is output to the console.
IFS 10 update 21, hosted internally.

Any ideas what could be wrong please for this one user? Thanks