First take a look onto the structure of your dynamic-page-url.
- https://www.wix.com/velo/reference/wix-location/prefix
- https://support.wix.com/en/article/velo-making-dynamic-page-urls-meaningful-with-prefixes
Navigate manually to the users dynamic page and take a look onto the URL.
You can also normaly the the dynamic url in your database related to the dynamic page.