Daniel, can you provide a screenshot for that message?

However if this is a built-in in Nintex Forms message, I doubt if that can be customized using any OOTB tool.

Regards,

Tomasz

I've added the screenshot with the message.

There must be a way to change the content of the message (like any other one)...

Hi Daniel Ohana‌,

Try using below custom JQuery, where after the form load the text will be updated to display custom message:

NWF$(document).ready(function () { 

NWF$(".nf-validation-summary")r0].headertext="<<Custom text that needs to be replaced with Please address the following:>>"

});

Thanks for the good solution Chaitra :-)