Update
I’m thinking more and more this doesn’t have anything to do with my project configuration. Its more of a connection/network issue. Without making any changes I ran the process this morning. The first transaction went to action center, I submitted it successfully and it returned accepted then the process failed - same error. I restarted the process, the next time (3) transactions went to action center and were returned accepted successfully until the process errored. Just recently, again with no changes I ran the process and (5+) transactions were accepted successfully until the process errored. .
Any thoughts on what I can look at to get more information as to what is happening and why?