Friend Safari connection problem

I can visit random players bases, but if i want to shiny hunt a specific pokémon and I enter a name from the spreadsheet it won’t connect and my screen looks like this (see appendix). But the game doesn’t freeze though cause when i press x i quit this loading screen.

The name you are entering might be outdated because the user has been banned, doesn’t exist, or you have typed it wrong. Not sure if this solves your problem but it has happened to me a few times, though it really hasn’t been an issue.