Hi
I'm received this error and it took a while to work out what it was.
In the "Source Models" it was pointing to the wrong environment, this is confusing because I could still see the "Saved Views" to click on, it would bail out straight after that with the error.
The complete error is:
"Failed to retrieve field list from the selected data source. Please check your import settings and try again."
Hopefully this will help someone when they google the error!