How to control local web page(overlay)

There is a problem. I have an overlay for a game that takes data from the game and inserts it into the page. I paste this page into OBS as a browser.
At the bottom of this page (which is not visible on the stream) there is a small menu for managing.Something add an information about winning games(score), turn on / off some kind of blocks. But when I change something in the browser, of course nothing changes in OBS, tell me how to solve it.

I have tried the webserver but it doesn’t change.