Crashing on Joining or Hosting a server

[Shagaron]

Before the update, everything was fine and I could join and host servers normally. But now, whenever I try to join or host a server, it crashes with a Runtime Error. I turned on and off the shaders, changed different preferences, etc. but it still crashes. Can someone help? 

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[Shagaron]

I don't know if this helps, but in the console right after crashing it prints "Error reading PNG file: IDAT: CRC error"

[Clone2]

I don't know if this helps, but in the console right after crashing it prints "Error reading PNG file: IDAT: CRC error"

Please attach the ENTIRE console.log.