This error occured just for the first time for this add-on.
I just changed the compatibility info to “-43”. Now I can’t change the listing anymore.
I changed the compatibility info to “-43” becaus changing it to “-44” led to an unexpected error - I think it was something like “max version too high”. To find out if I made a mistake or the problem was on the server side I thought that temporarily I’d try out “-43” … Unfortunately now I’m stuck with it.
I changed the compatibility info because I wanted to upload a new version for .45 of this add-on.