After submitting data from my published mobileForm (xdp) I get a error message from the browser:
"default.submit.html:1 Failed to load resource: the server responded with a status of 403 (Forbidden)"
Inside my author instance all work fine only after publishing to the publishing instance I get this error.
The problem was that the publishing server was not whitlisted on the authoring server under [adminui / settings / userManagement / configuration / settings]. After whitelisting the publishing instance for allowed references all work fine.