Surprisingly removing the NetworkTransform did the trick and fixed everything.
Btw, if you decide to check it: the project you have does indeed have the full network setup. All you need to do is to edit networkAdress and port in ZNetworkManager script, which sits on the GameController game object and you can immediately host a server with 'H' and join the server with 'C'.
Btw, if you decide to check it: the project you have does indeed have the full network setup. All you need to do is to edit networkAdress and port in ZNetworkManager script, which sits on the GameController game object and you can immediately host a server with 'H' and join the server with 'C'.