Launching BlitzNote (BlitzMail) fails

BlitzMail provides two app icons. One for configuration (named “BlitzMail”) and another that allows quick sending of emails (named “BlitzNote”).

On Xperia X (Android 4 environment) both worked just fine.

On XA2 (new Android environment) BlitzNote doesn’t launch anymore.

Is there a way to get verbose debugging info?

So far I only tried this:

$ apkd-launcher de.grobox.blitzmail.apk de.grobox.blitzmail/de.grobox.blitzmail.NoteActivity
Launching Android Intent android.intent.action.MAIN de.grobox.blitzmail/de.grobox.blitzmail.NoteActivity
#(nothing happens)