Replication job keeps ending in "Error: -1 - An unknown error has occurred"

Hi there,

I'm trying to set up a couple of replication jobs for our critical servers from our clustered production environment to a clustered replication area. Somehow all replication jobs end with the error message: "Error: -1 - An unknown error has occurred" and I'm struggling to figure out why this happens.

I'm running on the latest version of vRanger Backup & Replication (7.7.1.0). Also, all Virtual Appliances have been upgraded to the latest version available. All ESXi servers are running on ESXi version 6.0.0, build 3620759.

Could you please assist in what I am missing here? That would be great!

Thanks!

Chris