After the contained AG was dropped, why am I unable to access my SQL Instance?

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There could be several reasons why you are unable to access your SQL Instance after dropping a contained AG. Here are some possible explanations:

1. Dependency: The contained AG may have had some dependencies on the SQL Instance that were not properly uninstalled or removed after the AG was dropped. These dependencies could be blocking your access to the SQL Instance.

2. Permissions: Dropping a contained AG may have altered the permissions on your SQL Instance, preventing you from accessing it. Check your permissions and ensure that you are authorized to access the SQL Instance.

3. Configuration: It is possible that the configuration of your SQL Instance was altered when the contained AG was dropped, leading to issues when attempting to connect to it. Check your configuration and ensure that it is properly set up.

4. Network Issues: There could be network issues preventing you from connecting to your SQL Instance. Check your network settings and ensure that everything is properly configured.

5. Technical Error: There could be a technical error or glitch preventing you from accessing your SQL Instance. In this case, you may need to contact technical support for assistance.