Have you tried a modded save recently? Which patch version are you on? Let us know in the comments below, but remember: Happy racing.
This article breaks down everything you need to know.
This guide is for educational purposes. We do not endorse cheating or violating terms of service. You assume all risks.
In the current "updated" state of the game:
The new "Hybrid Mode" allows you to play offline with locally stored save data. This shift has made it possible to use external saves, though strict conditions apply: Exporting Data
Modded saves are usually created on specific versions of the game. If you download a save file created on version 1.0, and your PS4 has automatically updated the game to version 1.10 (or whatever the current patch is), the save file will be recognized as corrupted or incompatible. With the PS4's automatic updates, keeping the game on an older, "mod-friendly" version is difficult.