First of all; please provide me with a solid bug report at least following the bug report template; the template's there for a reason.
Second of all; are you using Mirror Mode?
Third of all; are you aware that nearly no scripts are working due to the new OSRS update?
As for the butler; please make sure you start it exactly as the thread states.
The issue you're having is mirror mode related. The client is failing to perform a certain action while trying to retrieve a RS2Widget. Using the script on stealth injection should work without any problems. Unfortunately, one is not able to specifically write a script for mirror mode.
Your BreakManager does not have a #getName function, every RandomSolver should have one, the client is trying to execute that method but it's not there, hence the NPE.