Editor hangs (freezes) after pressing play. Possible loop? Have to force quit.

I've never had to deal with this before, whenever I press play in my editor the project will hang until I forcefully quit Unity through task manager. Even when I run a build of the project the application will crash within the splash screen. I've read this could be a "loop" occurring but don't fully understand how to know how to fix it.

The project uses Photon PUN and is set up for multiplayer.

Here's the compiler text from the editor log: https://gist.github.com/anonymous/bd7c16a408a60fe3b9719343db43c07d

I'd absolutely appreciate some help on this! I've been stuck on this problem and just now feel I should ask for help, if you need anymore information I will respond ASAP.

Thanks in advanced!

edit* I fixed it. It had to do with developmental mode being switched off and the lobby scene not being a reference but even than it's really laggy...