Google App Engine Datastore Admin

When I try to access the Datastore Admin page in my GAE app, i get the following error

Error: Server Error

The server encountered an error and could not complete your request.
If the problem persists, please report your problem and mention this error message and the query that caused it.

I have switched it on in my app.yaml

builtins:
- datastore_admin: on

I am not even able to download data from the datast开发者_运维百科ore. I get the error Authentication failed. What could be the reason ?

The bug is something to do with using custom domain. When I create a normal application and upload the code, it works fine. Only when I have a custom domain, i get the problem

I changed the apps's authentication method from Google Apps Domain to Google Accounts API and it now works.

look at the procedure in this documentation.

Maybe you forgot to add :

builtins:
- remote_api: on