Gradle + sonar 2.8 issue

Task ‘:sonarqube’ is not up-to-date because:
Task has not declared any outputs despite executing actions.
User cache: C:\Users\sonar\cache
SonarQube server [https://xxx.xxxx.xxxx] can not be reached
:sonarqube (Thread[Execution worker for ‘:’ Thread 2,5,main]) completed. Took 0.634 secs.