Production hotfixes

Hotfix for production deploy

src/main/java/nl/tudelft/ewi/queue/viewmodel/RequestCreateModel.java

@@ -68,7 +68,7 @@ public class RequestCreateModel {
 		r.setQuestion(question);
 		r.setLab(lab);
 		r.setAssignment(assignment);
-		if (jitsi) {
+		if (jitsi != null && jitsi) {
 			r.setJitsiRoom();
 		}
 		return r;