My build ui is gone and I freeze on the loading screen.

So every time i would try to play the game i would get stuck on the loading screen with the green plumbob spinning and it wouldnt ever load, then once i finally got in, I tried to go into build mode just for my build ui to be gone (see attachment). I still havent got it back. Every time i hit the play button instead of the build button, it puts me back into the never ending loading screen. Please help.