Had some issues first, but after help from support everything is working great

I installed it at first and thought it did not work, but I just had to change some permlink setting and then back again to make my own custom checkout. ??
I`ll add the reply from support since I am sure more then me have this same issue.
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Hello There ,

This is a common issue in wordpress with Elementor. In most of the cases this issue arises for permalinks structure in wordpress. If you reset the permalinks structure your problem should be solved.

So, remove your Standard Permalinks Settings to any other settings. For example: if currently you have Post Name Settings then change it to Plain settings (screenshot) and then revert back to the Post Name again.

For more details you can check this article from Elementor.

Regards,
Benjir