Form can't be deployed "No Json object could be decoded"

Hello, thanks for your answer, but you didn’t understan what I wanted to do… I clasiffied every “parroquia” or location to know when it’s rural, urban and when its indigenous or a border region, that’s why I had the the selected () in the relevant column, so when I picked a location the form would tell me if it’s rural or urban, and if it’s indigenous and if it’s a border location… So… Some of them are rural and indigenous and border, others are rural and indigenous , other… rural and border, other., just rural… and the list goes on…
The form you shared tells me all of the categories, all the time, without picking a location and without classifing them (which is exactly the opposite from what I want)

The thing is… the classification with selected() worked fine for rural and urban categories… the problem started when I added indigenous and border, I don’t know why is that, and that’s what I want to solve