Something changed from v6 ?

Did you make these changes to your app? https://docs.grails.org/snapshot/guide/upgrading.html#_12_4_micronaut_in_grails_is_now_supported_via_the_plugin_grails_micronaut

Hi James, I'm using an app created by the forge First try with the http client functionality. It simply adds

implementation "io.micronaut:micronaut-http-client:4.9.10"
    implementation "io.micronaut.serde:micronaut-serde-jackson:2.15.1"

I also tried adding the plugin

grails-micronaut

Both give me the same result

We haven't added a feature for micronaut to grails forge yet - I think that's the missing link.