Unrecoverable error in application: route.todo.list on panel select.file

Hi,
New error has appeared when operator tries to access Incident record from My Groups Unassigned (filtered in groups). Records are being displayed but cannot be accesed, only the following error shows up:

Unrecoverable error in application: route.todo.list on panel select.file 

I researched forum a little bit and found something called "RAD Editor". Am I on the right track or maybe someone has a suggestion how to solve the issue?

Thanks, 

Viesha