Selector was not found for all the elements on page

[amol-16]

I am working on a POC to allow element style changes & preview and the library is throwing error: "Selector was not found" for all the elements (event.target)on a specific page. Even if root, element values are properly being passed to the finder function.
Sample webpage where it is failing - https://www.sanaullastore.com/
It is able to return the selector while using extension version of code but failing if same code is added via javascript.