RH-01 error on MI MIX -- maybe this is my first Android problem

Gmail stopped working on family's MI- MIX

error RH-01

clear data on google play service --- this helped

https://www.quora.com/How-do-I-fix-Google-play-store-error-rh-01

https://productforums.google.com/forum/#!topic/play/mhjnC-G_Oww

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it happened again

I have to clear cache often

it is bizare , as I got Mi MIX 6GB+256GB ( with a broken screen); it has plenty of room