Snapshot error "Other kind of backup error"

I keep getting an error at step 63-64 when doing a manual managed backup. Error message: "Other kind of backup error"

I tried backing up 3-4 times. I changed cPanel PHP settings to see if that would help - it did not. (v5.4 to v5.6). Added "define( 'WP_MAX_MEMORY_LIMIT', '256M' );" to wpconfig file - didn't help.

Logs no help:
[snapshot][2016-11-03 18:25:16][Warning] There was an error processing the files
[snapshot][2016-11-03 18:25:24][Warning] There was an error processing the files
[snapshot][2016-11-03 18:25:33][Warning] There was an error processing the files
[snapshot][2016-11-03 18:25:38][Warning] There was an error processing the files
[snapshot][2016-11-03 18:25:41][Error] Error processing manual backup: unknown:unknown

I have enabled support access. This is a basic one-page site hosted on Hostgator.

Thanks,
Bob