I’ve not used it, but I did try download clickhouse jdbc 0.3.1 to test this. It was packaged up in a jar_files.zip file. I extracted the files to a folder which I left as “jar_files”.
I then proceeded to do the same as you and try to add the jdbc jar file. Same result as you.
So I then removed that jar again from the dialog, and added the folder using Add directory, and then clicked Find driver classes…
Does that get you any further?