Python Forum

In the last days, I`m straggling with a problem that almost destroys my system:
Im using python 3.7.3 and IntelliJ but every time Im trying to code my system is starting to behave in an abnormal way, some routine seems to constantly run in the backward: in the same time I always have that:
How can I solve the case sensitive mishmash

Every time I use IntelliJ I`m seeing this

on the bottom of it when I am closing it this:

comes up.