Why are you trying to use remote assistance, my company uses real vnc, because its free and you can take control of a system without inivitations(and yes i know you can solicit requests), but as for the error, i googled the same thing and it says you dont have permissions to bypass treverse checking. Sorry i couldnt really help, but i definatelly would use real vnc, because its a free download, and i just like it more. Sorry