I'm getting this error at the final step for launching a new campaign where you click "Place Order."
Here it is...

Anybody know how to resolve this?
Thanks.
Well, it sounds like the ad/ad set configuration is doing something that it shouldn't be able to do.
It would be worth showing all your configuration details (just blur out anything sensitive).
These things happen especially when FB rolls out new features and misses small UI clashes.
I have resolved this. It appears to happen when you select an "optimize for conversions" campaign but forget to select a pixel in a campaign creation process. Thanks zeno.