The database owner SID recorded in the master database differs from the database owner SID

This problem can arise when a database restored from a backup and the SID of the database owner does not match the owners SID listed in the master database. Here is a solution that uses the "ALTER AUTHORIZATION" statement recommended in the error message:

DECLARE @Command VARCHAR(MAX) = 'ALTER AUTHORIZATION ON DATABASE::[<<DatabaseName>>] TO 
[<<LoginName>>]' 

SELECT @Command = REPLACE(REPLACE(@Command 
            , '<<DatabaseName>>', SD.Name)
            , '<<LoginName>>', SL.Name)
FROM master..sysdatabases SD 
JOIN master..syslogins SL ON  SD.SID = SL.SID
WHERE  SD.Name = DB_NAME()

PRINT @Command
EXEC(@Command)

Added this to the top of the tSQLt.class.sql script

declare @user varchar(50)
SELECT  @user = quotename(SL.Name)
  FROM  master..sysdatabases SD inner join master..syslogins SL
    on  SD.SID = SL.SID
 Where  SD.Name = DB_NAME()
exec('exec sp_changedbowner ' + @user)

Apply the below script on database you get the error:

EXEC sp_changedbowner 'sa'

ALTER DATABASE [database_name] SET TRUSTWORTHY ON