Form submission error / not going through

Hello,

I keep running into a variety of errors with the Hustle plugin, including messages like "Something went wrong please try again," "email address invalid," the form not submitting with no message at all, etc. I've tried various recommended methods to get it to work (i.e. disabling all plugins, updating Wordpress, the plugin, etc). Still nothing. I've granted you access - are you able to take a look and see what the issue may be?