Hi, I'm kind of having the same issue but I don't get to the point of receiving an error message. The export process just goes on and on for ages and never finish. First time that happens to me. I've try within Survey web and within AGOL from the feature layer detail page but it doesn't work.
*UPDATE* the error message finally arrived overnight
I can't see why I can publish a survey, use it, sync it but not being able to export it?
I can see something weird though, the base layer is not populated (0) even if I got a point shape with data into it. There's only the tables which contain have counts. There should have something into RN_Rapport layer...