Hey @Malachia how are you?
Basically, this kind of problems appear when your path to the file is too long!
Try to avoid nesting a lot of folders one inside the other, otherwise you will have problems to use some files or even to build your proyect!
You should also try to avoid “-” as separator, always use “_”, and never use non-english characters to name files or folders!
I posted an swer some time ago about it: Problem with multiplayer game build - #2 by BRGJuanCruzMK
These issues are common to all the engine versions, not only the one you are currently using, so keep these recommendations in mind as “Best Practices” for future proyects!
Hope this helps!