Error:Unable to load class ''. Possible causes for this unexpected error include:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.) <a href="syncProject">Re-download dependencies and sync project (requires network)</a><li>The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem. <a href="stopGradleDaemons">Stop Gradle build processes (requires restart)</a><li>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.</ul>In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.