One is for the server, the other for the client.
Plex Media Server:
Version number: Settings → Server_Name → General.
1.26.x.yyyy, 1.27.x.yyyy, etc.
Plex Web:
Version number: Settings → Plex Web → General
Bundled: Currently 4.76.1. Version bundled with Plex Media Server. This is the version that loads when you point your browser directly at your server. Used for claiming server, if internet is not available, etc.
Hosted: Currently 4.83.2. The current release with latest features & fixes. This version loads when you use app.plex.tv.
Plex Media Server 1.27.1.5891 is now available to Plex Pass users in the Beta update channel.
FIXES:
(Library) When media was deleted it could leave behind its sidecar files (#13479)
(Music) Album year and date fields could differ when preferring local metadata (#13591)
(Transcoder) Audio could drop out partway through playback when remuxing videos with very long keyframe intervals to DASH (#13411)
4.83.2
NEW:
Remove support for being controlled as a companion player. Use Plex for HTPC for remote control playback on the desktop.
Search: Fixed an issue that could cause results to show the wrong watchlist status in their context menu and details pages
Update copy for removing User from Plex Home.
Watchlist: Added settings page to generate RSS feed URL (needs a Plex Pass account)
Where to Watch: Restrict top level results in “Watch from these locations” section of details page to only show…