Fix for the following OpenVPN error

Error 
ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
This was the fix I used that worked for me.
  1. Create a bash script and save it somewhere:
    #!/bin/bash

mkdir -p /dev/net
mknod /dev/net/tun c 10 200
chmod 600 /dev/net/tun

/etc/init.d/openvpn restart
  2. Save it with 755 permissions
  3. Add it to the root crontab via the crontab -e command and add the following to the bottom 
    @reboot /path/to/the/bash/script
  4. Reboot the machine and pray :-)


Source: https://serverfault.com/questions/1003011/openvpn-error-cannot-open-tun-tap-dev-dev-net-tun-no-such-file-or-directory