Cannot find npm module, after installing apisync-generator with npm

Question

I've run into a wall with using AsyncAPI-Generator on a windows server.

I've been following these instructions and after successfully installing ag I needed to update the path the be able to access the CLI.

When running the cli I get an error saying that ag cannot find the npm module, despite being installed using npm.

C:\Users\jontia\workspace>ag cud.yml @asyncapi/java-spring-template
C:\Users\jontia\.sdkman\candidates\java\20.2.0.r11-grl\languages\js\bin\node_modules\@asyncapi\generator\node_modules\global-npm\index.js:11
  var err = new Error("Cannot find module 'npm'")
            ^

Error: Cannot find module 'npm'
    at throwNotFoundError (C:\Users\jontia\.sdkman\candidates\java\20.2.0.r11-grl\languages\js\bin\node_modules\@asyncapi\generator\node_modules\global-npm\index.js:11:13)
    at exports (C:\Users\jontia\.sdkman\candidates\java\20.2.0.r11-grl\languages\js\bin\node_modules\@asyncapi\generator\node_modules\global-npm\index.js:39:5)
    at Object.<anonymous> (C:\Users\jontia\.sdkman\candidates\java\20.2.0.r11-grl\languages\js\bin\node_modules\@asyncapi\generator\node_modules\global-npm\index.js:27:18)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.<anonymous> (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function._load (internal/modules/cjs/loader.js:879:14)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (C:\Users\jontia\.sdkman\candidates\java\20.2.0.r11-grl\languages\js\bin\node_modules\@asyncapi\generator\node_modules\npmi\npmi.js:1:14) {
  code: 'MODULE_NOT_FOUND'
}

This doesn't make any sense to me, how can the npm module not be available when I'm using it?