java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel at com.homework.plugin.button.ValidateButton.actionPerformed(ValidateButton.java:91) at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:281) at com.intellij.openapi.actionSystem.impl.ActionButton.actionPerformed(ActionButton.java:209) at com.intellij.openapi.actionSystem.impl.ActionButton.performAction(ActionButton.java:177) at com.intellij.openapi.actionSystem.impl.ActionButton.performAction(ActionButton.java:160) at com.intellij.openapi.actionSystem.impl.ActionButton.processMouseEvent(ActionButton.java:477) at java.desktop/java.awt.Component.processEvent(Component.java:6417) at java.desktop/java.awt.Container.processEvent(Container.java:2263) at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859) at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918) at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547) at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307) at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:976) at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:911) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:840) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:454) at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:773) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:453) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:822) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:507) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90) Caused by: java.lang.ClassNotFoundException: javafx.embed.swing.JFXPanel PluginClassLoader[PluginDescriptor(name=JavaRushHomeWork, id=com.javarush.plugin2, path=C:\Users\Admin\AppData\Roaming\JetBrains\IdeaIC2020.3\plugins\JavaRushIdeaPlugin.jar, version=3.44)] com.intellij.ide.plugins.cl.PluginClassLoader@f10070 at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:129) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ... 42 more