Default [Q] How to stop error message "System UI has stopped. Blame Tyler" on PAC rom ?

Hi,
I think that I granted a corrupted app with superuser access and now I get the "System UI has stopped. Blame Tyler".

How to go back to my previous full functionalities ?

FYI, the app that I suspect to be corrupted is called "screencast", I was trying to record my screen using it...

Thanks.

Best,
Yohan.