"Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@bfxyz.nl 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."

While i try to download anything ... can you fix it ?
Thank you.

ps
for example
https://www.bfxyz.nl/cgi-bin/bfxdownloader.pl?file=bfx64.xll