@Tinskel
Are you installing the game on an external hard drive or have anything plugged into your USB port on the PS4? I've seen issues in the past where some files can be accidentally installed on both the internal and external hard drive, causing the game to pull data from two different sources. If you are using an external hard drive, we recommend using one licensed or manufactured by PlayStation to avoid any unforeseen technical issues.
Regarding the USB port. We've also noticed the Rock Band "dongle" cause a freezing issue at the main menu for FIFA 19 if plugged in, not sure if maybe you're in a similar situation.
If you haven't attempted a true power cycle with the PS4 yet, let me know if this helps.
- Touch the power button on the front of the PS4 for at least 7 seconds (until the system beeps twice). Turn it back on after 1 minute. Launch the game.
Good luck!