What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
The kml and kmz files are used with programs like Google Earth. We need to collect and share this info when a form is create it
Looking at the screenshot of your form showing the error as well as confirming the same in your form, I can see that the attachments have not been added to the allowed list.
Please do check out the following guide to add the kml and kmz extensions to the list of allowed ones: Upload Field Allowed File Types
It is only important to make sure that there is a comma and a space (, ) before the extension that you are going to add into the list. After the last however, there should be neither of the two.
As you do, please do click on OK to save the change, otherwise it would not be saved.
So for you, you should add:
, kml, kmz
at the end of the current list.
or if you want to have only those two extensions as allowed, then you should remove all others currently added and add this instead:
Once you do and click on OK, the form should work properly for you.
Do let us know how it goes.