In some cases our client may not support older operating systems. To use our client on these systems you will need to install an older version of the client. You find these here:
OS X 10.11.6 (El Capitan)
Ubuntu 32 bit
sudo apt-get install gdebi-core cd /path/to/OVPN/deb sudo gdebi OVPN_i386.deb
Do note that these client versions do not receive active updates. You can also choose to use a different client such as Tunnelblick or Viscosity.