I'm not talking about links saved in a browser. I clicked on the URL's in this thread.
This link with portal in it :
https://portal.softrak.com/products/OE20171204.pdfgets you:
Internal Server ErrorThe server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at mikew@softrak.com 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.