I could not upgrade the plex server to the latest version of 1.27.1.5891. Since i upgrade my nas Terramaster to Version TOS5, the only version i could install is the one in there app store. And once a wild it will stop. so i have to manualy restart it.
As far as I am aware the version of PMS available on the Plex website is not yet compatible with TOS 5. I believe you will have to stick with the version available from Terra-Master for the time being . . .
https://forum.terra-master.com/en/viewtopic.php?f=28&t=3358&start=150
link above to Teramaster forum where there is a link to 1.27 for TOS 5
After the upgrade, The TOS5 app centre still states plex media server is 1.24 but when you run the app plex shows the version as 1.27
