Is Pokemon GO's Facebook login error fixable?

Pokemon GO was well-known for its connection hiccups during its July 2016 launch, but players may still occasionally run into a connection error here and there during gameplay.

How To Fix Facebook Login Issue on Pokémon Go: How to Troubleshoot and Solve the Problem 2023

I received the “Unable to authenticate” or “Failed to log in” message — Pokémon GO Help Center

How to easily fix 'Unable to Authenticate' issue in Pokemon Go - Dexerto

Pokemon GO Can't log in with Facebook error: How to fix, possible reasons, and more

javascript - App is not active. App is not accessible right now. Facebook Login issue React native - Stack Overflow

How to get around the connection issues from Pokémon Go to Let's Go! - Polygon

How to fix No Facebook login in Pokemon Go

How to Fix Pokémon go adventure sync not working Android

Pokemon Go: How to Fix the Facebook Login Error