plug-in org.eclipse.m2e.core.ui was unable to load class

Question

I had made an maven project and it worked fine. Then I installed plugins EclEmma Java Code Coverage, PHP Development Tools (PDT), Eclipse.orgSonarQube

Then I worked on some other project. When I again wanted to create an maven project,it threw the following error window which said

The selected wizard could not be started
reason
plug-in org.eclipse.m2e.core.ui was unable to load class
org.eclipse.m2e.core.ui.internal wizards.MavenProjectWizard

Answer 1

Removed SonarQube plugin .This solved the issue. Now it works all fine. But is there any other solution to this problem since I have to use sonar.