I upgrade a project from GWT 2.5.1+Java 8 to GWT 2.9 +Java 11 I got (TYpeError): Cannot read property 'Xe' of null when I
IUploader currentUploader = new Uploader(fileInputType, autoSubmit);//autosubmit = true IUploadStatus statusWidget = new IUploadStatus(); try{ currentUploader.setStatusWidget(statusWidget); }catch(Exception e){ //print error here // (TYpeError): Cannot read property 'Xe' of null got printed here } This code does not have any problems when I use GWT 2.5+Java 8 //Symptom The upload file GWT File control is shown. I can clicked the control and select a file to upload The control shows the selected file name but it does not call http servlet that is on server side. Web.xml <servlet> <servlet-name>uploadServlet</servlet-name> <servlet-class> edu.vanderbilt.mc.aries.server.rpc.control.AttachmentUploaderService </servlet-class> </servlet> <servlet-mapping> <servlet-name>uploadServlet</servlet-name> <url-pattern>*.gupld</url-pattern> </servlet-mapping> I ggogled the erro rmessage. It seems that this is a JQuery error Any suggestions or comments are really appreciated Yibin Li -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-web-toolkit/31fbd64b-566c-4586-a84f-d77e1f5196den%40googlegroups.com.