perfect

src/services/echarts.ts

@@ -13,7 +13,7 @@ export function changeTheme(theme: string) {
   charts.forEach((item) => {
     item.list.forEach((chart) => {
       if (chart.data.name === 'echarts') {
-        chart.data.echarts.theme = theme;
+        chart.data.echarts && (chart.data.echarts.theme = theme);
       }
     });
   });