How to copy-paste a page from one site to another without breaking elements?

I cloned a beautiful webflow portfolio ( because I love the transitions and beautiful layout of projects. However, I already have another webflow site on a paid plan and custom domain, so I want to copy the cloned site over to my current site.

Screenshot 2023-06-21 at 10.40.23 PM (cloned site)

When I copy-paste the “page-wrapper” to my current site, I receive this message on the side:

Screenshot 2023-06-21 at 10.42.08 PM

When I preview my current site with the copy-pasted elements, many are broken and don’t work like the cloned site. For example, on the cloned site, when you hover your cursor over a project the cursor changes and the project image grows blurry with text overlaid on top. Meanwhile, on my current site with the copy-pasted elements, the hover just causes my cursor to disappear completely.
Another example is that there are some cool animations/transitions on text that turn into just static text on the copy-pasted version.

How can I get the copy-pasted version to work as intended? I am super new to Webflow and trying to make a portfolio. Please let me know if there is any other information I can provide.

Thank you!