Draft Download Fails because ME servers are missing files

Here is the error log from server "downloadmanager0.txt" that shows failed request for 2 exe files that trigger "Draft Download Fail" error in deployment configuration.

[16:50:26:731]|[03-06-2017]|[DownloadManager]|[INFO]|[132]|[SERVER-...]: Going to establish connecton for http://patchdb.manageengine.com/crs/patches/AppleApplicationInstaller.exe|
[16:50:27:418]|[03-06-2017]|[DownloadManager]|[INFO]|[132]|[SERVER-...]: The http status code returned from web server : 500|
[16:53:44:341]|[03-06-2017]|[DownloadManager]|[INFO]|[133]|[SERVER-...]: Going to establish connecton for http://patchdb.manageengine.com/crs/patches/PreReqHandler.exe|
[16:53:45:014]|[03-06-2017]|[DownloadManager]|[INFO]|[133]|[SERVER-...]: The http status code returned from web server : 500|

here is server side error

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root@localhost 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.