Debian Buster insync installation doesnt work


I am using insync since years and this on all of my Linux and Windows systems.
After a new installation of my system, I run Debian Buster (Kernel 4.18.0-3-amd64) and added the insync repository.

After running
“sudo apt install insync” I cant start insync like before my new system installation.

Every try of using any command on my terminal gives me the same output:

insync quit
Traceback (most recent call last):
File “isyncd/linux/headless/”, line 108, in ipc_insync
File “”, line 228, in meth
error: [Errno 111] Connection refused

I read some other topics with the same or similar problems but nothing helps.

Any idea what I can do?

Thanks in advance