VNC Connect Error Messages – RealVNC Help Center
help.realvnc.com › hc › en-usAug 15, 2019 · A remote computer user is attempting to reverse-connect from VNC Server to you, but VNC Viewer is not in listening mode. To put VNC Viewer in listening mode, run the appropriate command for your platform. Then, ask the remote computer user to connect again. An attempt was made to access a socket in a way forbidden by its access permissions (10013)