Citrix XenDesktop 7.6 lost connection with databaes

I need someone right now, you will be paid per hour. These are errors I get from the event viewer: The connection to the database has been lost. Error details: Exception 'General database error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)' of type '[login to view URL]'. Ensure that the database is correctly configured and accessible. The Citrix Broker Service has detected an issue with communication with the database. To preserve functionality, the system will now enter leased connection mode where user requests will continue to be satisfied from information gathered on user connections made earlier while the database communication was working, until the database functionality is restored. Ensure that the site database is running and is configured correctly. The Citrix Broker Service experienced an internal error while enforcing a power policy. The service failed in its interaction with the XenDesktop database and was unable to determine the policy actions needed. This may be the result of the database being unavailable. Check that the database is online, and that connectivity exists between it and the XenDesktop controllers. Error details: Exception 'Cannot connect to database server' of type '[login to view URL]'. The connection to the database has been lost. Error details: Exception 'Cannot connect to database server' of type '[login to view URL]'. Ensure that the database is correctly configured and accessible.