C++ Program no longer working after converting engine to static library

So I have recently converted a good many files in my game engine into a library, as to make using said engine far easier to utilize for future projects. However, the program no longer seems to render images to the screen, even though it was working perfectly fine before the transition. It still opens the window, initializes the libraries and everything else, and the class meant to contain the texture, position and all of that data is receiving all of that data accurately. It's just that glDrawElements() doesn't seem to be functioning properly, or I don't know really. So is there any reason the conversion may have messed something up in the main program?