When clicking dataset visualisation links (UCSC, IGV, IGB, bam.iobio bam.iobio.io ...) on my galaxy installation [20.09] I'm always getting error:

Error: (null)://mygalaxy.mydomain.org/display_application/3d954174ae8d....

When manually changing the link from "(null)://" to "https://" the link is fully functional.

Other links from galaxy interface (download icon for any dataset) works without any problems.

Any help would be highly appreciated!

best

Lubos