Can't join a network for Zerotier ran on CasaOS.

I added Zerotier to casa using Docker compose.

I checked if the container is running. It is.

But when I join a network using command : sudo docker exec zerotier-one zerotier join

I am getting this error :

OCI runtime exec failed: exec failed: unable to start container process: exec: “zerotier”: executable file not found in $PATH: unknown