FortiClient Installers Not Appearing

Hi,

I needed some with EMS I have installed on a server for couple years. No changes have been made but I've realised that now that I'm creating new installers, it doesn't create them. I get the following when I click on the installer link:

"The requested URL /installers/IM Testing/ was not found on this server."

I checked in the Clients > Installers directory and it doesn't create any folders in there either. 

As you can see I already have two packages, they are working fine but they were created some time ago. I am trying to create an installer for v6.4.0 and enabling auto update. 

If anyone has got this before or could provide advise that'd be great.