Not authorized and Media server not found

Documents to assist with running Plex on Synology NAS:
Installation & Setup of Plex Media Server on Synology
Synology FAQ - Questions, Answers, and a few How-To’s


You cannot use Synology QuickConnect to claim a server.

Option 1: From a system on the same network as the NAS, use a private/incognito browser window pointed at the IP address of the NAS: http://192.168.0.107:32400/web.

Option 2:
Step 1: Uninstall Plex Media Server. When given the option, choose Uninstall Only.
Step 2: Re-install the same version of Plex Media Server. Use the Plex Claim Token option.
Step 3: Login via http://192.168.0.107:32400/web. The server will already be claimed. You can then configure libraries, etc.