Failed to Send Invite

Plex Media Server
1

Server Version#: 1.22.1.4275
Player Version#:N/A

Attempting to add friend, getting this error. Had user change their username but no change.

Screen Shot 2021-04-04 at 9.20.23 PM
Screen Shot 2021-04-04 at 9.20.23 PM842×594 44.6 KB

2

How many friends do you have? There is a limit of 100.