Charset exception

I passed to a friend of mine a project (in Python), but he got this error:

I didnt use any font

This is not a font-related issue. Are you parsing some text from an external text file/source (like a JSON or XML file, or something)?

No, but I think its because my friend opened this project with his (very) old notebook, when he opened my poroject with his desktop pc everything worked fine(that its newer)