On 2019-04-27 jrsoftware release innosetup-6.0.2.exe. I am using the old javapackager and I see that it perform a check to version 5 or newer.
But it check the version by looking for a number in the output of iscc /? wich now return Nothing in version 6 and iscc is detected as version 0. By digging i can see this check is performed in jdk.jpackage.internal.WinExeBundler.java. I now that javapackager will be replaced by jpackage but i can see the same check is done in jpackage so it will also be broken !! I started a thread to see if inno setup can reintroduce a number in iscc /? to repare the old javapackager but it seems an bad idea to perform this check according to news.jrsoftware.org/read/article.php?id=107406&group=jrsoftware.innosetup#107406