Package stuck on "retrying download"

Hey all,

Lately, whenever I create a new policy and upload new software to be deployed, the policy gets stuck on 'retrying download' status multiple times. Sometime it takes 1 hour for clients for download but other times over 3. This happens for every single software resource, so policies with multiple pieces of software take over a day to install.

Screenshot of client:

Screenshot of package server:

Please help, I'm basically unable to reliably deploy any software at the moment.

Thanks