This also affects me. I'm using Ubuntu 17.10 with default GUI setup. It looks like XWayland is running. I entered the xhost command as suggested by ichro furuya above and that resolved the issue. Personally the xhost shouldn't be required. The installation should arrange the security so I don't have to do this.
This also affects me. I'm using Ubuntu 17.10 with default GUI setup. It looks like XWayland is running. I entered the xhost command as suggested by ichro furuya above and that resolved the issue. Personally the xhost shouldn't be required. The installation should arrange the security so I don't have to do this.