The jar com.atlassian.studio:studio-common-components-plugin:jar:2.0.6 is required for building JIRA Agile source code, however this is not publicly available for download.

I can not in the list of "https://maven.atlassian.com/content/groups/public/com/atlassian/studio/"

Due to this reason the user is not able to build the JIRA Agile source code.