Some Fortnite players are currently facing ce-40852-9 error while downloading the game. According to PlayStation Support, Fortnite CE-40852-9 error is a server issue. There are a few different tricks that will work for you.
Rebooting or restarting your PS4 sometimes resolves Fortnite CE-40852-9 error. According to the official PlayStation forum post, the user can retry the download for few times.
Apart from this, increasing the connectivity speed would solve Fortnite error code CE-40852-9. To make the change, go into “Settings”, “Network”, “Set Up Internet Connection.” Once there, select the relevant Wifi/LAN. Afterward, select “Custom”.
Make sure the IP Address Settings are set to Automatic, the DHCP Host Name equals Do Not Specify, and the DNS Settings are Manual. The Primary DNS should be 8.8.8.8, and Secondary DNS – 8.8.4.4. Lastly, make sure the MTU Settings are Automatic and the Proxy Server reads Do Not Use.
If you still receive Fortnite ce-40852-9 error code after all of that, contact the PlayStation Customer Support line 1-800-345-7669.
