ElementsKit Causing Site Not to Show Responsive Layout

I’m not sure if it’s an updated version of ElementsKit or Elementor or what. But there is a conflict somewhere. My site no longer shows a responsive layout.

Here are things I tried:
– I disabled the experiment for custom breakpoints. I made it active. Neither worked.
– I enabled all experiments. I disabled all experiments. Neither worked.
– I made every section and inner section full-width.
– I played around with paddings on the Header/Footer elements I built in ElementsKit. Nothing worked.
– Set site width in Elementor Settings to 960px to match what the theme says the site width is. Didn’t work. (The theme is UDesign.)

The only way I get the site to load responsively is by doing one of these things:
– Deactivating ElementsKit
– Leaving ElementsKit active but deactivating the Header Template I created in ElementsKit.
– Deactivating Elementor (which renders ElementsKit useless).
– Changing theme to Twenty Twenty-two.

All of this used to work when I launched the site a few months ago. I just now realized it no longer looks good in mobile.

I don’t see any CSS that has @media width instructions.

Please advise. Thank you.

The page I need help with: [log in to see the link]