await for _findGeneratorClass

Author: mshima

lib/environment.js

@@ -564,7 +564,7 @@ class Environment extends Base {
 
     // eslint-disable-next-line node/no-unsupported-features/es-syntax
     const importModule = async () => import(meta.resolved);
-    const instantiate = async (args, options) => this.instantiate(this._findGeneratorClass(await meta.importGenerator()), args, options);
+    const instantiate = async (args, options) => this.instantiate(await this._findGeneratorClass(await meta.importGenerator()), args, options);
     const instantiateHelp = async () => instantiate([], {help: true});
     const newMeta = {
       ...meta,