Intellij AntLR Problem

[stano-vittorio]

Hello everyone, I have this problem after I compile the .g4 file:

com.intellij.diagnostic.PluginException: `ActionUpdateThread.OLD_EDT` is deprecated and going to be removed soon. 'org.antlr.intellij.plugin.preview.PreviewPanel$4' must override `getActionUpdateThread` and chose EDT or BGT. See ActionUpdateThread javadoc. [Plugin: org.antlr.intellij.plugin]
	at com.intellij.diagnostic.PluginProblemReporterImpl.createPluginExceptionByClass(PluginProblemReporterImpl.java:23)
	at com.intellij.diagnostic.PluginException.createByClass(PluginException.java:90)
	at com.intellij.diagnostic.PluginException.reportDeprecatedUsage(PluginException.java:125)
	at com.intellij.openapi.actionSystem.ActionUpdateThreadAware.getActionUpdateThread(ActionUpdateThreadAware.java:21)
	at com.intellij.openapi.actionSystem.AnAction.getActionUpdateThread(AnAction.java:199)

How can I fix the problem? There are 8 in all of these errors every time.