I'm trying to publish a survey that was created from an existing feature service. I keep getting an error stating Error transferring Gateway Time-out code: 499.

I'm not sure what I have done wrong for this to not work. I tried publishing other "test" surveys and they all published successfully.
This survey is going to be writing to an existing feature service as well as related tables. Perhaps there's an issue with how I setup those tables.

The image below illustrates how I setup my feature service and related table connections.

If it helps at all, I just upgraded to 3.12.232
Any and all assistance would be greatly appreciated.
Thank you for your help.
~Dan