I'm not sure if this is your problem but people can set it in their Privacy Settings so that no-one can follow them, Friends Only, or Anyone. Perhaps the people you're trying to follow haven't set their preference to Anyone.
I'm not sure if this is your problem but people can set it in their Privacy Settings so that no-one can follow them, Friends Only, or Anyone. Perhaps the people you're trying to follow haven't set their preference to Anyone.
When you say "before", to when are you referring? What was the last point at which you're aware it worked?
I believe the last change to the Privacy Policy was late December 2022, so if it was before then and it's happening on every account you're trying to follow it might be your privacy settings that is the issue...