Server not accessing to the internet

Hello;

For a few days my sever can not access to the internet. I use OMV 6.5.0-3 and docker to run Plex and Nextcloud.

I first noticed that my Plex was not found when I tried to watch a movie from the app and then that the mail app of Nextcloud is unable to sync emails. While trying to solve the problem by updating OMV packages, I noticed that no update was found and the list of plugins is limited to the ones installed on my server.

I can access to all functionnalities from my local network and from internet. It is like the flow is just one way.

Do you know how to fix this?

Thank you

Thank you so much Wolf2000. It works perfectly!