Atlassian plugin sdk problem Error404

It seems related to this error: Confluence template plugin tutorial: 404 error

You can either:

  1. downgrade your JDK to a version with a minor version number < 255
  2. force the upgrade of ICU
  3. upgrade to a more recent version of Confluence, aka in pom.xml something like

<confluence.api.version>7.14.0</confluence.api.version> <confluence.runtime.version>7.14.0</confluence.runtime.version>