Backup fails with “Failed to create backup index” (4040312)

Looking at binary log we see  “Failed to create backup index”  as seen below, but looking at the trace from the plugin the client is using we see  “Failed to init crypt handle: 'Crypto module 'No module selected' not found.'”.

From binary log:

Information        2015/09/26 09:00:00       324        Schedule              NETVAULT          Starting phase 1 on UK-IMS01

Background        2015/09/26 09:00:00       324        Data Plugin         UK-IMS01            Plugin Version 6.0.9 (Build Jul  9 2013 14:39:51)

Error      2015/09/26 09:00:01       324        Data Plugin         UK-IMS01            Failed to create backup index

Error      2015/09/26 09:00:01       324        Jobs       NETVAULT          Fatal error: Backup failed

From trace:

0             FILESYS ???         5472      31           2             151051526122   Failed to open C:/Program Files (x86)/Quest Software/NetVault Backup/config/jobmgr.cfg error The system cannot find the file specified.

0             PLGLIB  ???         5472      1005      0             151051728919   Failed to init crypt handle: 'Crypto module 'No module selected' not found.'

0             VMWBCKUP       ???         5472      530        0             151051728919   Failed to create backup index

0             VMWUTIL           ???         5472      8             0             151051931716   Unexpected call to logout - not logged in at present!

Checked the advanced option of the backup and encryption was selected.

Checked client where backups was trying to run and encryption plugin was not installed