Time to teach a person to fish:
Your traceback says it found the following error in the ipatch (PatchSG.rpy):
ScriptError: could not find label 'EndScreen4x5p'.
If it's a known error, most likely people have mentioned it before.
So your first step should be to search the thread for the bit it's complaining about:
EndScreen4x5p
And voilà, there's a few
recent posts which mention it, one of which will point you to a solution:
There's a bug in the patch, but
Sancho made a
fix for the unmodded game. All hail Sancho's efforts to rectify dev blunders!