Hi...
Have you tried the process with one of the three sample characters supplied with AccuRig (Go to File > Load Sample Character).
If the issue occurs with the sample characters, then it may be a local system issue.
Please first make sure your computer is fully up to date by going to Start > Settings > Windows Update. Once this is done, please download the latest graphics drivers from Nvidia or AMD depending on the graphic card being used.
However, if the problem continues after updating, please feel free to contact Support using the link below. They will be able to advise you further.
https://www.reallusion.com/CustomerSupport/UserEx/QForm.html
Peter
Forum Administrator
www.reallusion.com