Corrupted encrypted disk - please help!

Dear Experts,

I’ve got a 1TB WD Elements external hard disk that was formatted into a single partition MacOS X Journaled and encrypted, it worked well since I connected it to my new MacBook Pro 2016 15” suddenly the disk stopped working. Now when I run First Aid in Recovery mode this is what I get:

“First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery.”

Here under the details:

Checking prerequisites

Checking the partition list

Checking the partition map size

Checking for an EFI system partition

Checking the EFI system partition’s size

Checking the EFI system partition’s file system

Checking the EFI system partition’s folder content

Checking all HFS data partition loader spaces

Checking booter partitions

Checking booter partition disk2s3

Verifying file system.

Checking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking volume bitmap.

Checking volume information.

The volume Boot OS X appears to be OK.

File system check exit code is 0.

Checking Core Storage Physical Volume partitions

Problems were found with the partition map which might prevent booting

Operation successful.

My partition is gone, no volume, nothing…

Do you have any idea how I can get back my data?

Thanks!!!!