I don’t have anywhere near 50, much less 100 and I am experiencing this same issue. I had 18 and was trying to add an 19th and it was throwing this error. I have two servers on the same account, and even allowing for it counting each server as being shared twice for some reason, it wouldn’t be 50.
I was able to invite this person on to the server, and it now shows us as “friends”, but when I try to share libraries with them, it gives the “Something went wrong while sharing” error. I have also deleted a couple of users who had not logged in for a long ol’ while and it hasn’t resolved this.
Is Plex planning to provide a response to this issue as I am trying to add someone today. I am a Plex Pass subscriber with less than 30 users and am getting this message today preventing me from sharing with a new person.
You have triggered a temporary IP ban, this usually happens if too many account-related things like creating shares happen within a very short time.
On top of that, something in your account is trying to do something like the above every 20 minutes. Thus, prolonging the ban.
Stop your 3rd-party tools and let everything sit for at least 24 hours before trying anew.