Sorry, you can't follow more than 400 players on Lichess.

@oberschlumpf,
All right. Thanks for the very comprehensive answer.
Unfortunately I cannot follow you. I'm sorry

@campacavalloscacchi : You are welcome. By the way I discovered at least 2 of your followed people, where the account was closed (by themselves or by Lichess). Maybe there are more cases. I'll send you the two closed accounts via PM.

lol following 100 people is more than enough, 400?!