Error: Admin UI SDK – Error while fetching extension registrations from Extension Manager: {"statusCode":500,"message":"Internal server error"}

[KrishnaMa11]

When I add the Admin UI SDK in Adobe Commerce, it does not appear. I see the following logs in the admin-ui-sdk logs:

Admin UI SDK – Error while fetching extension registrations from Extension Manager: {"statusCode":500,"message":"Internal server error"}, Status code: 500.

However, the UI action works perfectly in Adobe Experience Cloud.