CRITICAL ERROR: REDCap server is offline!

For unknown reasons, REDCap cannot communicate with its database server, which may be offline. Please contact your local REDCap administrator to inform them of this issue immediately. If you are a REDCap administrator, then please see this additional information. We are sorry for any inconvenience.

Message for REDCap administrators:
Your REDCap database connection file [/home/redcap/public_html/ahnat/database.php] could not connect to the database server. Please check the connection values in that file ($hostname, $db, $username, $password) because they may be incorrect.