How To Fix The Cannot Start Application On Ps 4. In this case, you need to rebuild the database in the Safe Mode. The console will start in safe mode.
This includes "Saved Data in System Storage", "Saved Data in Online Storage", "Saved Data on USB Storage Device", and "Auto-Upload". In this case, you need to rebuild the database in the Safe Mode. If your system drive is different than C:\, type C: and then press Enter.
It's important to wipe the disc in straight lines from the center to the outside edge.
When you press the PS button as prompted, you'll enter the Safe Mode and get another screen message: Connect a USB.
From there, choose "System Storage" and then "Cached Data.". The application data may be corrupted. Hold off until the download and installation are finished.