Hello,
I make my project on a mac and when I build a windows version sometimes I get weird builds - not connecting or not instantiating a player.
My workaround to fix this:
- Select The Build platform in Build Settings
- wait for Unity to compile scripts
- Save project and re-run Unity
- when loaded, run it in Play mode
- wait to scene to load and exit Play mode
- then build the project
I dont know if this helps, but in my case I have noticed Unity needs to load some background scripts (my non-programmer guess) or something with a fresh run. Thats why I re-run Unity and enter/exit Play mode and it works for me
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About the "Obsolete error" I read somewhere here on forums not to worry about them for now, I get those too they are just spam for now from Photon sample assets.