Submit button doesn't work

Hello from a Wix novice.

Promised to make a simple website for the Baytown Humane Society in TX. Knew that the application form would be the most difficult, so I started there.

Created the Application data set for form submission and added a few fields, connected each field to the data set. Created the submit button with success/fail messages following Wix’s directions but it doesn’t work. The fail message displays.

https://baccr1.wixsite.com/website/application

Any ideas? Please help.

Since the form is for a new application, you should have the dataset set to write-only :

When the dataset is set to read-write, the form tries to load data values that don’t exist.

Thank you!