Connecting to transport service?

I was able to play on release just fine, but today trying to run the game I cannot get past connecting to transport service. This occurs when I try to play multiplayer. I have restarted my pc, verified game files, uninstalled and reinstalled, and logged out and back into my xbox live account. I just want to play with my friends. If anyone has any idea on how to help please let me know.

I am having the same issues and i have found others as well who have had it. I played on launch day and now I cant either. I have not found a fix either.