All my websites are down

all my websites are down showing the following messages:
"Error establishing a database connection" and
"Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request."

Thank you for contacting us for help!

Your sites were down to do scheduled maintenance on your mysql server, a notice was posted when you log into the panel. We have completed all upgrades to your MySQL server! Everything was successfully upgraded and all services should be running as expected. Thanks a ton for your patience. If you happen to be seeing any issues or have any questions, please contact our support team here:

Matt C