Cannot stream video using Web player on any browser

Plex Players Desktop Players
1

Server Version#: 4.30.2
Player Version#: Chrome 83 / Firefox 77.0.1

I’m running PlexMediaServer in a a docker container (image built by LinuxServer.io), on top of OpenMediaVault 5 (Debian 10).
I’m able to stream videos using the DLNA, but I can’t stream using any browser on my Ubuntu 18.04 ( It works fine using my mobile App).
When I select a media, the browser displays the a picture from the movie and get stuck; the movie never starts.
In browser console (Firefox), I get continuously the following message:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://127.0.0.1:32400/media/providers?X-Plex-Product=Plex%2…ce-Screen-Resolution=1463x328%2C1920x1080&X-Plex-Language=fr. (Reason: CORS request did not succeed).

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://127.0.0.1:32400/?X-Plex-Product=Plex%20Web&X-Plex-Ver…ce-Screen-Resolution=1463x328%2C1920x1080&X-Plex-Language=fr. (Reason: CORS request did not succeed).

[Connections] [Loopback] is unavailable at http://127.0.0.1:32400/media/providers (Status 0) 2 chunk-3-3f60d034937c1e92cdb6-plex-4.30.2-225a4ec.js:9:717734

[Connections] All connections to [Loopback] failed

I’ve found many threads related with “Cross Origin request Blocked” but nothing corresponding to my case.
Also, note that the Loopback error appears immediately when I connect to my Plex Server on Firefox.
Your help will be appreciated.

2

Hi,
I’ve finally found out the solution; all the credits to @litation thx to his thread Transcode issue).
Worth sharing this information, which will be very usefull for all OMV users, running Plex in a container.
By default OMV mount the disks with noexec option, in particular the RAID5 volume on which I’m storing Plex config and media binded volumes.
You must edit /etc/fstab and remove the option noexec on the volume where you store Plex Media, and suddenly you can watch your video using Web Player.

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