The issue is definietly with me, but based on the examples I could find I have no idea why the build fails.

build.gradle.txt
gradle.properties.txt
Fails with:
e: java.io.FileNotFoundException: C:\Users\Jump\IdeaProjects\modern_computers\build\kotlin-classes\main\META-INF"modern_computers".kotlin_module

So, the cause is that it just does not compiles kotlin sources.

you're putting a " in your filename. no. bad.

Yeah, shortly after that I figure it out, that I had the quotation marks in my config file.