fix panel not working in grafana 10

src/panels/corpglory-dataexporter-panel/components/Panel.tsx

@@ -499,7 +499,7 @@ export function Panel({ width, height, timeRange, eventBus, timeZone }: Props) {
   );
   const mainDiv = (
     <div>
-      <Table width={width} height={height - 40} data={tasksDataFrame as DataFrame} />
+      {tasksDataFrame && <Table width={width} height={height - 40} data={tasksDataFrame as DataFrame} />}
       <HorizontalGroup justify="flex-end">
         <Button variant="primary" icon="plus" style={{ marginTop: '8px' }} onClick={openDatasourceModal}>
           Add Task