"KUAL-KDK-2.0.azw2" = "kindlet" version of KUAL.
The firmware version you have on your Kindle doesn't support running "kindlets" / "active content", that was discontinued years ago..
You need to use newer, "booklet" version of KUAL that is installed using a ".bin" installer using MRPI (yes, using / running MRPI which is primarily seen and used as a KUAL extension to install KUAL itself might seem to be "ass-backwards" order of things).
Downloaded
KUAL (coplate) from the Snapshots thread:
https://www.mobileread.com/forums/sh...d.php?t=225030
You copy the MRPI extension files to Kindle drive (into "extensions" folder) and copy KUAL bin installer file into "mrpackages" folder and then disconnect your Kindle from your computer and then run MRPI by typing "
;log mrpi" (without quotes) into Search bar on Kindle and pressing the icon that runs the search.