Hi Sean,
I am sorry to see you leave Advanced Ads with a bad experience.
The connection to your AdSense account that you were trying to establish is used to pull ad units and stats. While this can be comfortable, you can still deliver your AdSense ads without making the connection in Advanced Ads.
When my team made me aware of your problem, I personally tested the connection on a couple of sites that have various setups and run on different servers. The connection was always established successfully. So we took a bit more time to investigate.
As we found out by now, the issue might be connected with your DNS setup.
I would be curious to learn if we could help you find the issue and document it for other users. However, I also understand that you moved on.
All the best to you and your project!
Thomas
