OO-5288: fix upload slide in BigBlueButton meeting in a business group

src/main/java/org/olat/modules/bigbluebutton/ui/SlideUploadController.java

@@ -121,6 +121,7 @@ public class SlideUploadController extends FormBasicController {
 
 	@Override
 	protected void formOK(UserRequest ureq) {
+		meeting = bigBlueButtonManager.getMeeting(meeting);
 		VFSContainer slidesContainer = bigBlueButtonManager.getSlidesContainer(meeting);
 		fileEl.moveUploadFileTo(slidesContainer);
 		meeting = bigBlueButtonManager.updateMeeting(meeting);