Normally the PS4 Error CE-34878-0 shown due to the network issues or some or connectivity issues. Follow these steps to fix PS4 Error CE-34878-0.
You Can Fix PS4 Error CE-34878-0 By These Methods:
1. Restart PlayStation
Restarting your PS4 can fix error CE-34878-0 what it does is by restarting its can fix any issues that causing the system to slow network problem and also fix the bugs that are causing network issues.
2. Unplug Router
Unplugging router or modem for 10 to 15 minutes and plugging in can help to fix PS4 error CE-34878-0.
3. Change DNS Settings
Try to change the DNS settings to do this go to advanced settings and change the DNS setting from automatic to normal and change Primary DNS settings to 8.4.4.8 and Secondary DNS settings to 8.8.8.8
By changing DNS settings to these it can fix server issues and fix PS4 error CE-34878-0.
4. Change WIFI Frequency Bands
Changing the wifi freqency brands from automatic to 4 Gigahertz chamn fix PS4 error CE-34878-0.
5. Test Internet Connection
once try to test the internet connection by doing this will fix PS4 error CE-34878-0.
6. Server Isuue
Sometimes the issue may not be from your side it may be the game server isuue due to this we can see this error all you have to do is just waiting till the servers are live.
7. Contact PlayStation
Even after trying the all above steps still getting an error you need to contact with PlayStation customer care they can give you guidance on how to fix PS4 error CE-34878-0.