title: Android gradle unable to find method 'org.grade.api.internal.file.DefaultSourceDirectorySet'
body: <p>I tried to convert a java class to Kotlin, which worked Ok except I got the following error.I tried to re download all dependencies like suggessted in the below, but to no avail.Please help me with this error.</p>
  
  <p>Error:</p>
  
  <pre><code>Error:(2, 0) Unable to find method 'org.gradle.api.internal.file.DefaultSourceDirectorySet.&lt;init&gt;(Ljava/lang/String;Lorg/gradle/api/internal/file/FileResolver;)V'.
  Possible causes for this unexpected error include:&lt;ul&gt;&lt;li&gt;Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
  &lt;a href="syncProject"&gt;Re-download dependencies and sync project (requires network)&lt;/a&gt;&lt;/li&gt;&lt;li&gt;The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
  &lt;a href="stopGradleDaemons"&gt;Stop Gradle build processes (requires restart)&lt;/a&gt;&lt;/li&gt;&lt;li&gt;Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.&lt;/li&gt;&lt;/ul&gt;In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.
  </code></pre>