Container Station/Docker Error : Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Hi.

Got a Qnap NAS TS-230 with two disks (no RAID, only network access disks). Version of QTS is 5.2.3.3006. Container station is installed and works fine.
Installed Watchtower (that worked some time ago) and Portainer from Docker Hub to maintain my apps in docker.
Both got the same error : “Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?”
I connected my NAS with SSH and explored the files. It seems that there is no docker.sock in /var/run directory but docker.sock= (yes, with a “=”, maybe for security reasons).
Is that normal ?
Cannot copy or do anything to the file.

How could I get these apps working ?

If there is no solution, how to update an app (Jellyfin) in Qnap Container Station (all the tutos I found have access to a console which is not the case in Container Station).

Thanks for help.

I am facing the same problem with containerstation V3.0.9.
I could configure a portainer container with an older version of CS and it is sitll running under the current version.
But it is not possible to change the configuration with recreate. I get a warning that the bind mount to /var/run/docker.sock is not valid.

Checking the /var/run directory shows “docker.sock=” - strange.
Checking the running processes with “netstat -a -p unix | grep docker.sock” shows correct socket file:

unix 3 STREAM CONNECTED 2028040091 31947/dockerd /var/run/docker.sock

Is this a hack to prohibit running another docker frontend but containerstation it self?