Remote access with tightvnc over zerotier

I have a PC running Tightvnc server. If i try to remote access with a tightvnc client over the zerotier IP, it works if both PCs are in my local network. However, I I try to remote access the tightvnc server from outside my local network, it does not work. I get “Error: no route to host”.
Any help will be appreciate it.
Thank you.

Are you connecting via using the manged IP shown in the zerotier control panel? i.e. not using the local IP of the device.