I have a client that has a publicly shared survey through their Portal installation.
I can open and successfully submit the survey through the Survey123 website.
Downloading the survey to a Survey123 client and trying to send a completed survey causes the device to be stuck on the 'Getting Service Information' dialog.

Looking at the diagnostics log file i see the following:
<12>1 2018-03-13T11:22:30Z dlengton Survey123forArcGIS 13532 - [AppStudio@11205 category="default" filename="XFormFeatureService.qml" line="876"] qrc:/qml/XForms/XFormFeatureService.qml:876: TypeError: Cannot read property 'name' of undefined
Any ideas? Is it a field that has a null value but isnt allowed to have one? I'm a bit stumped... any information will be highly appreciated!