Typo

serverURL should be ‘http://localhost:1337/parse' rather than
‘http://localhost:1337'

index.js

@@ -15,7 +15,7 @@ var api = new ParseServer({
   cloud: process.env.CLOUD_CODE_MAIN || __dirname + '/cloud/main.js',
   appId: process.env.APP_ID || 'myAppId',
   masterKey: process.env.MASTER_KEY || '', //Add your master key here. Keep it secret!
-  serverURL: process.env.SERVER_URL || 'http://localhost:1337'  // Don't forget to change to https if needed
+  serverURL: process.env.SERVER_URL || 'http://localhost:1337/parse'  // Don't forget to change to https if needed
 });
 // Client-keys like the javascript key or the .NET key are not necessary with parse-server
 // If you wish you require them, you can set them as options in the initialization above: