Hey Cindy,
Thanks for getting in touch with us!
Looks like you have a JavaScript error in the admin and it’s causing Aggregator not to display correctly.
Ca you check in the browser console and see if you can see any error descriptions? Check this article out if you are not sure about it: Using your browser to diagnose Javascrit errors.
Also, Can you please follow the steps described in our Testing for conflicts guide? This way we can see if this is a problem in our plugin or a conflict with the theme or other installed plugins.
Please let me know about it,
Best,
Nico