I am getting below error for thumbnail of page  Internal Server ErrorCannot serve request to /content/project/pgds/lang/john.thumb.48.48.png in com.day.cq.wcm.core.impl.servlets.ThumbnailServletException:java.nio.channels.IllegalSelectorExceptionat org.eclipse.jetty.server.Response.setContentType(Re...

i am not able to see the thumbnail for any pages in aem, Could you please let me know the issue if anyone knows.