CA Service Desk 17.1
CA Service Desk 17.0
There is no known root cause for this issue. It only happens in Chrome for certain workstations. The same user who is not able to download an attachment in his/her own workstation is able to download it in another workstation.
There is no available and definitive solution for this issue. What you can do is to guide end users for using Microsoft Internet Explorer or Microsoft Edge in order to workaround this issue. Because of having this issue in certain workstation, end users would request the workstation to be reinstalled in order to make sure there is nothing corrupted in the Operational System or Chrome.