I have a Veracrypt volume that was mounted on my PC. My PC rebooted while the volume was still mounted and now the volume won't mount. I get this message when attempting to mount the volume. I've tried mounting with the backup header option with no luck. Is there anything that I can do to get the volume mounted/ Error-message.rtf
I have had something similar happen to me, and I could not get it re-mounted.
Best option is to restore a backup unfortunately.
You will lose anything you put in or updated through the day (if the backup was run last night) - I don't think there is anything you can do about that.