Hi Mark,
The error message appears because the Crystal Report Server is configured to run under a local machine account, or an account which does not have access to the reporting database server. Configure the Crystal Report Server to run under a domain account, which has sufficient rights to access the Microsoft SQL Server database server. Check with your Database Administrator about the rights required on the database server.
Basically , You have to navigate to CCM >> SIA >> Properties and check the Account from which it is running.
Hope this will help.
Regards,
Mahak