PyCharm Docstring :func: and :meth: not working

Question

I am writing a documentation in my project's code but the inline link to a function/method doesn't work. It simply doesn't show up as expected when I use CTRL + Q:

EDIT:

Code:

class Editor:

    def picture(self):
        """ The same as :func:`pictures` """
        pass

    def pictures(self):
        pass