Don’t mistake this answer for me knowing anything about this module because I just cloned it for the first time.
I’m not sure what IDE you are using, but in IntelliJ you need to enable this option on your run configuration:
All of the Ignition SDK dependencies are marked as “provided” scope in the Maven pom files, which basically means “these are provided by the environment I will run in, so I need them to compile against but don’t need to package them for runtime”.