— Ok, so does your main program use "Display.py"?
— Or if it's not the case what is the name of the module you're trying to use
— The module is laying in the same directory as my main program
— Can you please try this:
Start a new python interpreter within any directory except your "src" folder. And try to import Display, if it doesn't give any error, then you have a module called "Display.py" in your system packages.
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— Clean code cache when you rename things
— I renamed it on my raspi but not on my laptop and my laptop gives me the exact same error
— Use git to get consistency into this mess