Cannot claim server after docker removal + reinstall and entirely removing config directory

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Since I last posted, I have also tried the UserCredentialReset.sh script from @ChuckPa as per this:

I stopped my docker, ran it with -p option to my Preferences.xml and got this output:

Plex Media Server user credential reset and reclaim tool (User-Defined)
 
This utility will reset the server's credentials.
It will next reclaim the server for you using a Plex Claim token you provide from https://plex.tv/claim
 
Using given Preferences path:  'Preferences.xml'
Please enter Plex Claim Token copied from http://plex.tv/claim : claim-****************
Clearing Preferences.xml
Getting new credentials from Plex.tv
Claim completed without errors.
 Username: ****
 Email:    ********** 
Complete.  You may restart PMS.

but after docker restart I get the same result.

If I go to Authorized Devices in plex I see that it recently authorized with version number and everything:

schnauzer4
a few seconds ago
1.40.0.7775-456fbaf97
Plex Media Server
Docker Container (LinuxServer.io)
Linux 5.4.0-47-generic

But clicking on the server in plex interface i still get the dreaded: