Welcome to the forums.
Have you installed the latest update 7.1 update for premiere pro cc? If not please update and then try to open the project.
Thanks for the quick reply.
I updated Premiere Pro CC as soon as the error started occuring. The same error still continued to happen when I tried opening my project.
Try creating a new project, navigating to the old one with Media Browser and importing one sequence at a time.
Oh my gosh, thank you so much. That worked. I thought for a moment it wasn't going to, since nothing showed up in my sequence window for the old project, but after a minute or two what I needed popped up. So thank you. You're a life saver.