@nevermay We’ve checked your account in the backend and nothing appears to be amiss (and we also found no backend issues for other players that reported a similar issue).
The only thing I can suggest is to try the PlayStation Support troubleshooting steps here:
https://www.playstation.com/en-gb/support/error-codes/ps4/ce-34878-0/
I hope you’re able to find a working solution! Sorry I can’t be of more help 