fix crash if task is started without global inputs

src/Pages/GroupTasks/Overview/GroupTasksViewModal.js

@@ -581,6 +581,8 @@ export default function GroupTasksViewModal({ isOpen }) {
       currentGroupTask.current.GlobalInputs
     );
 
+    if (parsedGlobalInputs === null) return <></>;
+
     return (
       <>
         <h2