Error 33: Destination not found

I am trying to setup data replication over WAN and created a task on the source system where I can see and select the destination share of the target system (over WAN). But every time I try to start the job it comes right back and records the following error "Error 33: Destination not found."

Does anyone have an idea what this error is referring to? I don't know why it would say "Destination not found." if it could create the replication task in the first place where it allows me to select the destination share.

Are there other ports necessary to be open on the firewall?

Thanks for you hints!

did you enable replication for the share ?

Yes, Data Replication is enabled on the target system and for the share