I don't see how to fix the problem for Graphtec Studio. But there is a problem with Graphtec Silhouette Studio software not loading the fonts to the software. Maybe the solution will work also for Graphtec Studio. If not contact Graphtec Tech support. There is also a youtube video for this.
Press the Windows and R Keys.
Type %localappdata% into the Run box.
Press Okay.
Open the Microsoft folder.
Open the Windows folder.
Open the Fonts folder.
Right-click on each font.
Select Install for ALL Users.