I made a video to explain the situation on a completely fresh install of openhab, here are the steps to reproduce.
- Install a FRESH openhab with https://community-scripts.github.io/ProxmoxVE/scripts?id=openhab
- Install the Astro binding
- create a thing related to the sun
- it’s impossible to link the trigger channels of that thing (see the video)
I made a post for the Astro binding as well Astro binding on fresh install: impossible to link all the trigger channels with OH 4.3.0 "There is no profile available for the selected item"