Database Owner Is Invalid

The owner of the database no longer exists, which can cause issues; especially with SSMS.

Suggested Action

Set the database owner to the system administrator.

How to Change the Database Owner to sa

ALTER AUTHORIZATION ON DATABASE::[WhippetWorks] TO [sa]
GO

How to Find the Name of the Default System Administrator (sa)

SELECT SUSER_SNAME(0x01);  
GO

Further Reading

ALTER AUTHORIZATION (Transact-SQL) | Microsoft Docs