cannot to retrieve user data failed to get document because the offline mode (kotlin) [closed]

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https://github.com/wexles/Askiappfinal here my project开发者_开发问答's github link

whenever I run the application it gives an error "cannot to retrieve user data failed to get document because the offline mode" and I cannot establish an internet connection. I don't know what to do. Please help me.

here error image

I looked at all opened problem files but none of the solutions worked.