This happened only 1 time after the first login.
I deleted App Data to reproduce it, but didn't happened.
workaround: **
restart MC.
NOTE:
What I did.
Unistall MCPE_v1.16.201.
Install MCPE_v1.16.210.
Open MC (featured Servers not visible)
Login.
Click the achievement tab( everything ok )
Click Server tab(featured Servers not visible).
popup Error -3
Restart MC.
Everything OK ( featured servers VISIBLE).
Could you please try restarting your device and let us know if that resolves the issue?