If the SQL Server DBO (Database Owner) schema is not functioning properly on a hosting environment. Firstly, ensure that the database user associated with the DBO schema has the necessary permissions. Verify that the user has ownership of the database and the required privileges to execute queries.
To solve this issue you need to change the default schema of a user. The following example changes the default schema of the user userxyz to dbo.
ALTER USER userxyz WITH DEFAULT_SCHEMA = dbo;