NoClassDefFoundError on runIde gradle command

Hi,

when I try to run/debug my plugin with gradle by using the runIde command, I get an exception:

java.lang.NoClassDefFoundError: Could not initialize class org.apache.http.conn.ssl.SSLConnectionSocketFactory
    at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:964)
    at de.undercouch.gradle.tasks.download.internal.DefaultHttpClientFactory.createHttpClient(DefaultHttpClientFactory.java:86)
    at de.undercouch.gradle.tasks.download.internal.CachingHttpClientFactory.createHttpClient(CachingHttpClientFactory.java:43)
    at de.undercouch.gradle.tasks.download.DownloadAction.executeHttpProtocol(DownloadAction.java:224)
    at de.undercouch.gradle.tasks.download.DownloadAction.execute(DownloadAction.java:182)
    at de.undercouch.gradle.tasks.download.DownloadAction.execute(DownloadAction.java:133)
    at org.jetbrains.intellij.jbre.DownloadActionWrapper.super$2$execute(DownloadWrapper.groovy)
    at org.jetbrains.intellij.jbre.DownloadActionWrapper.execute(DownloadWrapper.groovy:22)
    at org.jetbrains.intellij.jbre.DownloadActionWrapper$execute.call(Unknown Source)
    at org.jetbrains.intellij.jbre.JbreResolver.getJavaArchive(JbreResolver.groovy:59)
    at org.jetbrains.intellij.jbre.JbreResolver.resolve(JbreResolver.groovy:40)
    at org.jetbrains.intellij.jbre.JbreResolver$resolve.call(Unknown Source)
    at org.jetbrains.intellij.IntelliJPlugin$_configureRunIdeaTask_closure12$_closure46.doCall(IntelliJPlugin.groovy:334)
    at org.jetbrains.intellij.IntelliJPlugin$_configureRunIdeaTask_closure12$_closure46.doCall(IntelliJPlugin.groovy)
    at org.gradle.util.GUtil.uncheckedCall(GUtil.java:432)
    at org.gradle.api.internal.ConventionAwareHelper$2.getValue(ConventionAwareHelper.java:87)
    at org.gradle.api.internal.ConventionAwareHelper$MappedPropertyImpl.getValue(ConventionAwareHelper.java:136)
    at org.gradle.api.internal.ConventionAwareHelper.getConventionValue(ConventionAwareHelper.java:114)
    at org.jetbrains.intellij.tasks.RunIdeTask_Decorated.getExecutable(Unknown Source)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.TaskPropertyInfo$4.create(TaskPropertyInfo.java:99)
    at org.gradle.util.SingleMessageLogger.whileDisabled(SingleMessageLogger.java:217)
    at org.gradle.api.internal.project.taskfactory.TaskPropertyInfo.getValue(TaskPropertyInfo.java:97)
    at org.gradle.api.internal.project.taskfactory.TaskClassValidator.validate(TaskClassValidator.java:78)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:41)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)
    at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
    at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:124)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:80)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)