Help with incompatible types: com.atlassian.jira.user.ApplicationUser cannot be converted to com.atl

Hello,
I am trying to complete the Tutorial to create a report (https://developer.atlassian.com/jiradev/jira-platform/guides/projects/tutorial-creating-a-jira-repor…) and I am unable to to run JIRA due to the error below:
[ERROR] /Users/bjackson/myPlugin/src/main/java/com/atlassian/plugins/tutorial/jira/reports/SingleLevelGroupByReportExtended.java:[140,115] incompatible types: com.atlassian.jira.user.ApplicationUser cannot be converted to com.atlassian.crowd.embedded.api.User
I have already uncommented the jira-core artifact in the POM project. Does anyone know how to solve this issue? Any help is greatly appreciated.

You need to convert between ApplicationUser and User for some API’s that have not been updated:

See https://community.atlassian.com/t5/JIRA-questions/Cast-Exception/qaq-p/69715