Server Version#: 1.19.1.2701 - Windows Server 2016
Player Version#: 4.32.1 - Windows 10
Very recently, I have not been able to see the “Sharing” option (between General and Tags) when editing a movie when using Chrome. However, I can find it when using Edge.
I have tried to clear the cache on Chrome but no change. I do believe I installed an update to Plex server in between it working and not working, but cannot tell for certain.
Disable all your web browser add-ons in Chrome. One by one, until you can see the tab again (refresh the “website” in-between attempts with F5).
Then re-enable them again one by one until you have identified the culprit. Disable it for the URLs of the Plex web app.