fix

public/react/config-overrides.js

@@ -72,7 +72,7 @@ module.exports = override(
     style: true
   }),
   addWebpackPlugin(new MonacoWebpackPlugin({})),
-  // addWebpackPlugin(instance),
+  addWebpackPlugin(instance),
   (config) => {
     config.resolve.plugins = config.resolve.plugins.filter(plugin => !(plugin instanceof ModuleScopePlugin));
     if (process.env.NODE_ENV !== "development") {