iOS – Your package contains a file '<filename>' with a name that contains invalid characters. Avoid using control characters in the names

I am trying to launch an app to the app store but I keep getting this really annoying problem. It gives me

I can’t really seem to find what this means or fix this problem. This happens when I try to validate the app after it has been archived.

Is validating a project even necessary?

Any help would be appreciated. Thank you.