You’ll have to give us more info. Maybe a zipped version of the project or some way to view it.
To clarify a couple of things for you, cquery is only a linter. It doesn’t compile your project, so that’s not the issue. Paths to include files are agonistic of where the project is located, so that also isn’t the issue. The compiler would also spit out an error about not being able to find a file. Based on your thoughts, I’m guessing you ran into "main.h" Not Found (Linter), but this isn’t your issue here.
It very much looks like you’re missing an include/your code isn’t right. (Did you forget to push/change branches?)