[المهيمزي]

500 javax.servlet.ServletException: centra.cal.web.model.ModelException: EventViewModel.loadCrossDomainEntities(): error getting info event with guid null<br>
Chained exception = java.lang.NullPointerException: Can't specify null parameter value without type for condition null

javax.servlet.ServletException: centra.cal.web.model.ModelException: EventViewModel.loadCrossDomainEntities(): error getting info event with guid null<br>
Chained exception = java.lang.NullPointerException: Can't specify null parameter value without type for condition null
انا ادخل من كرووم وعندي الجافا وما يدخل على المحاضرات وطلع لي الكلام هذا ابغى اعرف المشكله