Does Caldera send messages on server issues?

Hi there :)!

I’ve costumized the success message (the green response box) to my liking with CSS. It looks awesome, and I want to do the same with error statements.

To simulate an error, I stopped the server (IIS on localhost) and send the form, but to my surprise there was no warning at all. Instead of a warning, there was a spinning circle runing forever.

So I’m wondering… There’s no front-end error comunications from the forms? How can I simulate an error in order to get the CLASS IDs that let me personalize the look of the error responses, if any?

Thanks in advance.

Regards.