The "DL3 and DL4" error is usually a temporary hurdle caused by server load or regional filters. In most cases, a or switching to an alternative mirror will get your download started immediately.
Many users leverage dl3/dl4 servers as seedboxes for torrents. Data centers hate this because it invites DMCA notices, legal liability, and peering disputes. The "DL3 and DL4" error is usually a
: Fully fault-tolerant; the highest level of security and uptime. and peering disputes. : Fully fault-tolerant