Before anyone else is starring at
java.lang.NumberFormatException: For input string: "72-internal"
and wonders why the ASDM won’t work with Debian GNU/Linux. For some reason it’s just not compatible with openjdk. Install oracle-jdk as explained on https://wiki.debian.org/JavaPackage and make pretty sure that your package stays recent.
After installing it, I still had to change the JVM in itweb-settings to
Shiny enterprise world.