Found the culprit, it’s the https://www.handyfeeling.com/setup and connecting The Handy to it which is preventing connection from being established with Intiface, looks like it can only be connected to one thing at a time. So if you plan on using it only locally do not connect The Handy over that site, just plug it in, enable bluetooth, go to intiface, start server and let it find your device, let the scan run if it’s first time so it detects it, then you should get no errors and clicking on toggle oscillation will make it move, click 2nd time to stop it and launch scriptplayer and it should all work from now on. Best to still use 5.0 dongle I’d say, they are cheap, have it close to the device (just in case).