fix of tasks page

Author: GoodDayForSurf

packages/devextreme-cli/src/templates/react/sample-pages/tasks/tasks.tsx

@@ -79,8 +79,8 @@ const dataSource = new DataSource({
         return {
           data: result,
         };
-      } catch (err<%=#isTypeScript%>: Error<%=/isTypeScript%>) {
-        throw new Error(`Data Loading Error: ${err.message}`);
+      } catch {
+        throw new Error(`Data Loading Error`);
       }
     },
   })