First please make sure you have the latest game and system updates. If you are still having issues after obtaining those updates then its possible a hardware issue is occurring.
First please try reinstalling the game data.
If that does not resolve the issue then you can try launching your system in safe mode and rebuilding the database
https://www.playstation.com/en-us/support/hardware/safe-mode-playstation/
If that still does not solve the issue then we would suspect an issue with your hard drive. If possible try installing the game onto a different drive to see if the issue still occurs. Also contact PS support as they can better assist with hardware related issues
https://www.playstation.com/country-selector/index.html