Crash firebase app with proguard that delete?

I have a chat application, I enabled proguard and I get the following crash the app:
https://pastebin.com/pBcae5as

Code of activity: https://pastebin.com/w8K42zEE
ProGuard: https://pastebin.com/50dCV5cw

It's almost like that here, but nothing helped.
June 14th 19 at 21:02

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