The IST links for downloading the PulseUI VPN client are broken. Until they are fixed you can download the appropriate file at one of the links below.

WINDOWS
https://home.cc.umanitoba.ca/~psgendb/birchhomedir/FTP/ps-pulse-win-22.3r3.0-b19959-64bit-installer.zip

MAC
https://home.cc.umanitoba.ca/~psgendb/birchhomedir/FTP/ps-pulse-mac-22.3r3.0-b19959-installer.zip

Linux - .rpm for RedHat, Fedora
https://home.cc.umanitoba.ca/~psgendb/birchhomedir/FTP/ps-pulse-linux-22.3r3.0-b19959-64bit-installer.rpm

Linux - .deb for Ubuntu or other Debian-related platforms
https://home.cc.umanitoba.ca/~psgendb/birchhomedir/FTP/ps-pulse-linux-22.3r3.0-b19959-64bit-installer.deb