The ad plugg widget does not appear .
Sorry for the trouble. I took a look at your site and I'm also unable to see the AdPlugg widget there. Did you remember to press the Update button after adding the widget in your wp-admin? If that's good, please check that you've cleared any caches that you are running. If you've already done both of those, it should be working.
You could try setting the Title on the widget. You could set it to something like "Sponsors", then see if the title at least shows up. If that doesn't work, try adding a different widget/block such as one of the default ones that come with wordpress (Heading, Paragraph, etc) and see if that works.
If you are still unable to get it to work, please contact us for additional troubleshooting.