I am trying to load a navbar.

I add the libraries and it recognizes the styles of some objects but when I try to add the navbar it does not load, then I open an example file, I add the navbar and there it does load it.

this is very bad functionality

and

The first image does load the styles, the buttons have it but it does not load the navbar and in the second it loads everything. in both the same files are called, the difference is that the second is inside the MDB folder and the first is a file from my project.