I’ve had this issue as well. I can tell from going to the developer console, that I can only see this:
Other than that, I had " DevTools failed to load SourceMap Could not load content for bla bla bla: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE" for several of my official plugins.
However, this is a issue in Chrome DevTools: Google Chrome DevTools failed to parse SourceMap: chrome-extension - Super User
An easy way to reproduce the problem for any developer reading this. Simply add this script into the House Ads and see if it shows up:
There’s nothing wrong with the script itself. It’s an affiliate ad and it will show up in any regular html site. Something from Discourse itself is blocking it.