New Landing Page Builder - Responsive Design Issues

Your software
My Mautic version is: 4.0.1
My PHP version is: 7.4.x
My Database type and version is: mariadb

Your problem
My problem is: I don’t understand how to ensure the Landing Page is fully responsive, who can help me? Where do I look to find the help I need?

These errors are showing in the log: N/A

Steps I have tried to fix the problem: I have just muddled my way through the builder to try and understand it. I can build a page, no problem there, it is just not responsive.

Any assistance in this regard will be appreciated…