If you get this error message, it may be one of two things. Either the Nvidia servers are experiencing an issue, and you'll have to try connecting again later, or the Nvidia Network Service needs to be restarted by doing the following:

1. Go to C:\ProgramData\Nvidia Corporation\NetService\ and delete the file "NSManagedTasks.xml"

2. Open the Windows Task Manager. Click on "Show processes from all users". Right click and chose End for the process "NVNetworkService.exe"

3. Now go to Run and type "services.msc"

4. Right click on Nvidia Network Service and start it. Restart GeForce Experience, and you should be connected again.