There was an error retrieving children in the OpenShift explorer

java.lang.NullPointerException
	at org.eclipse.epp.internal.mpc.core.util.ProxyHelper$ProxyAuthenticator.getPasswordAuthentication(ProxyHelper.java:124)
	at java.net.Authenticator.requestPasswordAuthentication(Authenticator.java:317)
	at org.apache.http.impl.client.SystemDefaultCredentialsProvider.getSystemCreds(SystemDefaultCredentialsProvider.java:92)
	at org.apache.http.impl.client.SystemDefaultCredentialsProvider.getCredentials(SystemDefaultCredentialsProvider.java:113)
	at com.openshift.internal.restclient.authorization.OpenShiftCredentialsProvider.getCredentials(OpenShiftCredentialsProvider.java:69)
	at org.apache.http.impl.client.AuthenticationStrategyImpl.select(AuthenticationStrategyImpl.java:184)
	at org.apache.http.impl.client.TargetAuthenticationStrategy.select(TargetAuthenticationStrategy.java:43)
	at org.apache.http.impl.auth.HttpAuthenticator.handleAuthChallenge(HttpAuthenticator.java:154)
	at org.apache.http.impl.execchain.MainClientExec.needAuthentication(MainClientExec.java:557)
	at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:275)
	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
	at com.openshift.internal.restclient.authorization.AuthorizationClient.getContextUsingCredentials(AuthorizationClient.java:134)
	at com.openshift.internal.restclient.authorization.AuthorizationClient.getContext(AuthorizationClient.java:99)
	at com.openshift.internal.restclient.DefaultClient.getContext(DefaultClient.java:504)
	at org.jboss.tools.openshift.core.connection.Connection.authorize(Connection.java:236)
	at org.jboss.tools.openshift.core.connection.Connection.connect(Connection.java:226)
	at org.jboss.tools.openshift.core.connection.Connection.retryList(Connection.java:445)
	at org.jboss.tools.openshift.core.connection.Connection.getResources(Connection.java:389)
	at org.jboss.tools.openshift.core.connection.Connection.getResources(Connection.java:376)
	at org.jboss.tools.openshift.internal.ui.models.OpenShiftProjectCache.getProjectsFor(OpenShiftProjectCache.java:59)
	at org.jboss.tools.openshift.internal.ui.explorer.OpenShiftExplorerContentProvider.getChildrenFor(OpenShiftExplorerContentProvider.java:93)
	at org.jboss.tools.openshift.internal.common.ui.explorer.BaseExplorerContentProvider$1.run(BaseExplorerContentProvider.java:167)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)