I have installed PM4K on LibreELEC but the user interface is much different than the interface on Windows PCs. I have no side bar, no connection to Plex.tv no request to sign in with my Plex userid & password. I have the Plex Media Server on my Synology NAS (DS220+).
What the heck am I doing wrong?
TIA - Mark 
Oh, in my /Userdata/addon_data/script.plexmod/settings.xml these settings are set to "Null" or "False":
<setting id="myplex.MyPlexAccount" default="true">{"ID": null, "title": null, "username": null, "email": null, "authToken": null, "pin": null, "isPlexPass": false, "isManaged": false, "isAdmin": true, "isSecure": false, "adminHasPlexPass": false, "thumb": "https://plex.tv/users/7dbb7e884e666ea5/avatar?c=1717264512", "homeUsers": [], "lastHomeUserUpdate": null}</setting>