[1] on december 3, i was tryng to join a friend's world - we've been playing for a couple of days straight without any problems - but i suddenly couldn't join.

[2] we tried her coming to one of my worlds, but she couldn't join either. we tried joining other servers to see if that would work, and she was able to join without a hitch, but i couldn't.

[3] i tried restarting my phone and wifi, but that still did not help. so i decided to sign out my account, but after doing that, i couldn't sign back in. 

 [4] i tried uninstalling minecraft, reinstalled it again, but i still could not sign back in. i have tried this many times now in a span of 24 hours, but nothing works. the error code that keeps coming up is 'CREEPER', but i know it's not my internet.

 [5] i have restarted my phone and my wifi router a couple of times, i don't have vpn, nothing's wrong with my connection. i have uninstalled and reinstalled minecraft numerous times. i'm at my wits end, i would appreciate it if someone could help me with my concern.