When you activate a media server, NetBackup can use it for backup and restore jobs. For example, you can deactivate a media server to perform maintenance. When a media server is deactivated, NetBackup does not send job requests to it.
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@systemmanager.forsenergy.ru to inform them of the time this error occurred, and the actions you performed just before this 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.