Fix mode error for vue users

Author: CompuIves

packages/app/src/app/components/CodeEditor/Monaco/mode.js

@@ -12,7 +12,10 @@ export default async (title: string, monaco) => {
     if (kind[1] === 'json') return 'json';
     if (kind[1] === 'html') return 'html';
     if (kind[1] === 'vue') {
-      if (!monaco.languages.getLanguages().find(l => l.id === 'vue')) {
+      if (
+        monaco.languages.getLanguages &&
+        !monaco.languages.getLanguages().find(l => l.id === 'vue')
+      ) {
         await requireAMDModule(['vs/language/vue/monaco.contribution']);
       }
       return 'vue';