Thank you. The log does show a serious problem:
Message: Unable to find databound item in text returned from server. Check that the capture is not stale, and check if the dynamic variable is needed. Uri[https://v-p2p.it.primepay.local/Employer/Overview?employeruniqueid=61620804A] Step BindingName[__RequestVerificationToken] FAULT USER.
In other words, when it tried to execute step 28 in the user profile, it was looking for the value for the dynamic target "__RequestVerificationToken" but could not find it. It seems the web server did not send it in a previous response as expected.
I did not realize your web site uses HTTPS. I should have explained you need to check "Decrypt HTTPS Traffic". Because this was not checked, the Fiddler trace did not capture any of the actual load test traffic. This prevents me from investigating further. Can you capture another Fiddler trace with this option enabled please then send it to me? I need this to see what the web server actually sent, compare it to what was expected so I can diagnose why we didn't get the expected response.