Error when including std::vector in separate file in Qt Project. Why?

[bogong]

Hello all!
Got the error when trying to include std::vector in separate file:

And there are error in compile log:

When I am using it in plain main.cpp everything OK:

Why it's happening? What am I missing?

[Christian Ehrlicher]

There is a file 'vector' somewhere in your include path which is messed up - find it and fix it.

[bogong]

@Christian-Ehrlicher Issue solved. There are no file. It was, somehow problem in the same directory naming. The project directory named "Vector", somehow it's been affecting including std::vector. When project directory name changed and not equal to "vector" - everything works fine.