Plex Media Server won't start on my Synology NAS

Plex worked previously and upgraded my NAS. Plex worked fine under the old OS Version. Cannot get it to start. Keep getting a ERR_CONNECTION and cannot find page.
Opened all ports on Firewall and opened Port 32400 BOTH on my router. Did the same for other APPS and all work except for PMS.
Noticed there is no Plex Share after upgrading however.
Been all over researching this and trying to logon via localhost or by IP but no avail.