Would you mind to check your form with Central test option or with the the Online validator, please, and first clean the issues:
Here are few more hints and examples to study, please: Ability to load locations into the geowidget to guide data collection - #39 by LN and Where can I find sample forms for select one from GeoJSON? - #2 by LN. (More can be founy with the seach function of this forum.)