UI's fail to install

[Wolfgang_S]

Your entry for the openhab repository seems to be outdated.

openHAB 2.5.x and the sunset of Bintray

All, The sunset of Bintray on May 1st caused existing openHAB 2.5.x installations to no longer be able to download add-ons from the remote repository (because this was actually Bintray). The original plan was to move this content to another place and offer a seamless switch for the users, but unfortunately this turned out to be more complicated than thought, so that it didn’t work out - at least until now. There are two options to fix the problem, though: Use the offline version of the add-…

The apt repo entry needs to point to:

deb https://openhab.jfrog.io/artifactory/openhab-linuxpkg stable main

instead of to dl.bintray.com