I have installed Plex Media Server on Arch Linux (latest version). I can’t add my media. When I try to do so, I get a message asking me to download Plex Media Server, I’ve already downloaded it! And I can no longer move forward.
In order to complete the setup you need to access your server through the bundled version of Plex Web. That’ll bring up a dialog where you’ll be able to name your server and link it to your account.
http://[PMS IP address]:32400/web https://support.plex.tv/articles/200288586-installation/
Once the server is linked to your account, you can also access it from other clients such as the hosted version of Plex Web (https://app.plex.tv/desktop). If you don’t want to link the server to your account, you can only access it locally using its IP address.