Keep getting this error and I am sorry I am not the smartest. Hope it is easy to fix.
Unpacking application files
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
504 Gateway TimeoutGateway Timeout
The gateway did not receive a timely response from the upstream server or application.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Something went wrong during the installation. Please see the documentation for more information.