fixed some undefined errors

src/harvestPlan/DuplicateHarvestPlan.tsx

@@ -35,7 +35,9 @@ export default function DuplicateHarvestPlan(props: Props) {
 
   const loadTasks = useCallback(() => {
     taskAPI.listTasks(50, 0, "asc", "start", plan.key(), undefined).then(resp => {
+      if(resp.data.tasks){
         setPlanTasks(resp.data.tasks.map(t => Task.any(t)));
+      }
       setReady(true);
     });
   }, [taskAPI, plan]);

src/harvestPlan/HarvestPlanTable.tsx

@@ -18,7 +18,9 @@ export default function HarvestPlanTable(props: Props){
   
   useEffect(()=>{
     harvestAPI.listHarvestPlans(pageSize, page*pageSize, "asc", "harvestYear", field).then(resp => {
+      if(resp.data.harvestPlan){
         setLoadedPlans(resp.data.harvestPlan.map(hp => HarvestPlan.create(hp)))
+      }
       setTotal(resp.data.total)
     })
   },[page, pageSize, field])

src/pages/Heaters.tsx

@@ -39,8 +39,8 @@ export default function Heaters() {
     objectHeaterAPI
       .listObjectHeatersPageData(pageSize, tablePage * pageSize, undefined, undefined, searchText, as)
       .then(resp => {
+        setHeaters(resp.data.heaterData ?? []);
         setTotal(resp.data.total)
-        setHeaters(resp.data.heaterData);
       });
   }, [objectHeaterAPI, as, pageSize, tablePage, searchText]);