Hi Erin, This error message can appear when the GoToAssist service has entered a stopped state and cannot be restarted. The workaround would be to reinstall the GoToAssist unattended installer. We can also look investigate further if you can provide the Date/time it occurred, the OS version on yours and the customer computer, and the GoToAssist Remote Support application log files that are stored on both your computer and the customer's computer. I can create a support ticket for this issue and email you the instructions. Just let me know. Thank you.
