Big Data Analytics Fail and Stop after Velocity Can't Find Layers in Analytic

[ArmstKP]

Our Analytics have been stopping randomly after we receive errors that Velocity can't find the source layers we have in our Big Data Analytics.  These issues all arose after the July ArcGIS Online and Velocity updates.  This has become largely crippling for us as our projects and outputs from our analytics are always incorrect because of our analytics stopping and not updating live status data.  Here are the errors we receive when Velocity can't find our item in AGOL that is a secured service from our GIS Server.  It finds it most of the day, but many times during the day it will not:

[JeffSilberberg]

Have you opened a ticket with support?

[ArmstKP]

@JeffSilberberg Over one month ago. 

Refreshing token worked for a day or two, then the errors came back...

[PeterNasuti]

@ArmstKP When Velocity throws this log message, it is simply indicating that it is not getting a valid response from the destination layer. I can facilitate coordination with the ArcGIS Online team to see what additional information we can pull from these failure events.

I will reach out via Esri Community direct message to provide my email address so that we could review together on a call and find a resolution.