VeraCrypt encrypted external USB drive no longer shows partitions

I made the mistake of setting up full disk encryption on my external USB hard drive. It was working fine that way for a year until this past week when the partition no longer shows up. It's a normal drive encryption (no hidden containers). I can still type in the VeraCrypt password, and mount the drive, but I can't access it.

Here are screenshots:

Harddisk 1 no longer shows any partitions:
http://i.imgur.com/BRL0z8i.png

I can still mount it in VeraCrypt by entering the correct password:
http://i.imgur.com/dKEGxcU.png

Once mounted, I get this error:
http://i.imgur.com/QLgVTmk.png

Then I get this error:
http://i.imgur.com/wU65PUf.png

Windows 10 Disk Management shows disk 1 as Not initialized and unallocated
http://i.imgur.com/HhMLZRH.png

Any suggestions? I am no expert and have no idea where to start. I do NOT have any recovery files or backups. My fault. Lesson learned. How can I access this disk again without too much trouble?

 

$100 reward if someone can solve this.

I think I made matters worse. I went to Diskpart and typed "Create partition primary offset=1024" -- Now it has a Partition1 which cannot be mounted at all in Veracrypt.

 

Anyone can help me solve this? I would offer a $200 reward if someone can solve it.

 

Problem solved. Close thread.