How do I handle errors in Ren'py

I'm making a game using Ren'py (based on python) and most errors aren't shown, especially the errors in python code. Is there a possibility to check for possible errors at compile time and how do I get where some errors occur? If there are errors the game normally doesn't run or breaks at the a errors appearance without a message.Is there maybe a file, where they are written in or something like that? Or do I have to debug using logs everywhere?