Ads are shown on your site. Are you using an ad blocker? You need to deactivate it. Find here more about this: https://wpquads.com/failed-load-resource-net-err_connection_refused-adsbygoogle-js/
I have deactivated it, but I still get the error. Also, clicking the Ad Check button says that the plugin is working fine, but checking Show Adverts only shows green rectangles where ads should be.

I did what the pinned topic “AdSense Ads Are Not Showing” said (typed “ad1” for one of the ads, specifically Ad 3) and checked the front page, and the text “ad1” did show.
Ads are shown: http://take.ms/0haHd
Your browser or one of its add-ons is the problem.
Try it from another browser and/or computer
Cheers
René
I tried it with Microsoft Edge, which doesn’t have any add-ons, and it still didn’t work. So I guess the problem is with my laptop. Oh well, I guess as long as other people can see the ads it doesn’t really matter. Thanks for the help.
I will try it with a library computer either today or tomorrow.