Can Pokemon GO's friend list error be fixed?

​A common "friend list error" has been affecting many Pokemon GO players, and it can be an incredibly frustrating experience.

Pokémon Go players have perfect fix for region-locked content halting Shiny Mew Research - Dot Esports

The Friendship Fix for Pokémon GO

How to fix Modern Warfare 2 “failed fetching crossplay friends list” error - Charlie INTEL

How to Fix Connection and Login Error

How Pokemon Go Update's New Trading And Friends Systems Work - GameSpot

How to Fix Unable to Authenticate Error in Pokemon GO - Prima Games

Is friend list/ gifts bugged? : r/TheSilphRoad

Pokemon GO Soft Ban: How to Remove It in 2023?

Half my time spent on PoGo is me just staring at this screen. I know it's a known glitch but it's been months with no fix so deserves its own thread because

Pokemon Go update adds “phantom gifts” glitch as data usage bug returns - Dexerto

How to fix the “Failed to Get Friends List” Error 0 in Pokémon Go - Dot Esports

Pokemon GO Friends List - 'Failed to get friends list' and adding friends not working - Daily Star