The problem is exactly that: the submit button doesn’t work in Internet Explorer.
The button animates as pressed, but does nothing and the browser says in a tiny message at the bottom: “Error in page”.
I’ve tried in Firefox and Chrome and works perfectly fine. As always, IE giving trouble.
It’s not a cache problem, it doesn’t work in any computer in IE (i’ve tried four different PCs).
Here is the link to the page: http://ayuntamientodealvarado.gob.mx/servicios/pago-del-predial/