Hi,
the link is no longer available we now host our packages here, https://download.pydio.com/pub/core/ci/?C=M;O=A
look for the pydio 6 package.
I’m not familiar with pydio 6 but you might be able to change the url for the new server.
edit: beware that once you have the link it will update you to the latest version of p6.