Problems with downloading dataset resource files via dataset detail page

[neuronick]

When clicking on the dataset file resource (distribution) link, no download happens in Chrome and an error about Mixed content is generated, if DKAN2 accessed via HTTPS (e.g: https://demo.getdkan.org). There is also a warning being generated on click: "Resource interpreted as Document but transferred with MIME type text/csv"

To Reproduce
Steps to reproduce the behavior:

1. Go to dataset detail page (e.g.: https://demo.getdkan.org/dataset/1f2042ad-c513-4fcf-a933-cae6c6fd35e6)
2. Click on the resource file link (e.g.: U.S. Adult Smoking Rate)
3. In Chrome no action will happen and the download will not be triggered.
4. You should see an error about Mixed Content in Development Tools console
5. You should also see a warning: "Resource interpreted as Document but transferred with MIME type text/csv"

Expected behavior
A file download popup appears with no errors / warnings being generated in console.

Screenshots

Details:

• Browser: Chrome