Debugging a plugin doesn't work - no plugin code is loaded. Follow

I'm developing my first plugin using the IntelliJ DevKit toolset and I'm not able to debug any developed features.  I currently have defined a custom action, put it in a group and have it open a dialog but when I debug it using the following debug config my plugin isn't loaded:

The plugin itself is valid because when I "prepare for deployment" and then copy/paste the jar into the plugin folder of my IntelliJ and restart it, it does exactly what I expect it to do.  It shows my menu item and when I click it, my code is executed and my dialog is shown:

You can find the entire sourcecode of my plugin here: https://github.com/senn/senn-ij-aem-comp-gen (incl. the .idea folder).

IntelliJ version:

IntelliJ IDEA 2021.2.2 (Ultimate Edition)
Build #IU-212.5284.40, built on September 14, 2021
Licensed to -redacted-
Subscription is active until December 23, 2021.
Runtime version: 11.0.12+7-b1504.28 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 8125M
Cores: 8
Non-Bundled Plugins: com.intellij.plugins.html.instantEditing (212.4746.57), org.intellij.scala (2021.2.17), Struts Assistant (192.9)
Kotlin: 212-1.5.10-release-IJ5284.40

Project SDK info:

If there's any other info you need, let me know.

Kr,

Bart