Cannot show requested dialog. (SqlMgmt) Property Owner is not available for Database

When I try to access database properties in SSMS, I faced below error.

This error looks like permission issue, but this is because of database owner was NULL. Not sure how owner changed to NULL.

Run below query to find owner of specific database

SELECT name,

       suser_sname(owner_sid) AS owner

FROM   sys.databases where name = 'DBName'

Change owner of database from NULL to SA

USE DBName

EXEC sp_changedbowner 'sa'

Now you can access properties of database in SSMS