No matter which version of SQL server you are using, When DB owner is deleted you cannot look DB’s properties.
Cannot show requested dialog.
Cannot show requested dialog. (SqlMgmt)
Property Owner is not available for Database ’[ ]’. This property may not exist for this object, or may not be retrievable due to insufficient access rights.
Solution is easy that change the owner using this query
Exec sp_changedbowner “USERNAME”
You have to run this for each DB