Possibly not enough Mobile data or Mobile reception not good, or mobile data is turned off on the phone? I’d look at restarting the phone, then check you have enough phone/mobile data with your carrier.
Could try clearing the App cache/data (Settings/Apps & settiings), search for “Brave” Storage. Clear storage/Cache. Also check “App data usage”, Ensure only “Background data” is enabled.
greetings admin, please help me to be able to login to brave, every time I try to always ask for a link, even though my previous login was using authenticator, thank you.