I was logged in on the same (admin) user than before.
I have been able to replicate the issue all the time.
Not being able to create a PIN when on app.plex.tv.
But able to when I log in to my server’s IP address directly.
I had 1.18 and guessed my problem was my server being out of date.
I proceeded to update to 1.19 and the issue remained
That’s when I tried to access via IP instead.
same here, I am used to set PIN to kids when their duties are not met, when all done I remove PIN so they can watch their series. It came with 1.18.9.2578 I guess. Not able to change or remove PIN
Can confirm i have also run into this issue. Panicked for a second worrying the database was corrupt but luckily logging in locally to change the PIN worked for me too.
Currently running Version 1.19.1.2645 on Linux.