Hello, I’ve got something that should solve your problem.
Navigate to “C:\ProgramData\HTC\Vive\ViveApps\34bcb517-4711-4ad5-a077-6bf26a380829\1552072991\Masterpiece_VR_Data\StreamingAssets”.
Here’s a link to Viveport.mpvrconfig. Copy Viveport.mpvrconfig into the StreamingAssets folder.
This should fix your issue until you uninstall MasterpieceVR. We’re still trying to figure out a permanent fix for this, but this should work for now.
Let me know if you have any questions about the steps above.