From what we've gathered this is a file corruption that happens when old Valiance files are still running/located in the computer somewhere. Please e-mail support as they can provide more info and files to prevent this from happening.
Please also be sure to send them PC specs, as well as OS to make sure there's nothing breaking from the PC itself when downloading/updating the game.
support@valianceonline.com
Thank you for your patience in figuring out this issue, it's super rare, but we still want to figure out the cause.