Find a "100% Complete" save file online (ensure it matches your game region: ULUS for US, ULES for Europe). Place it in your PSP/SAVEDATA folder.

Crash Tag Team Racing is a fan favorite for its unique fusion of platforming and combat racing, but it is notoriously finicky on the PPSSPP emulator. If you are dealing with the dreaded save data crash, follow this guide to get back on the track. Why Does Crash Tag Team Racing Crash During Saving?

The emulator processes data faster than the original PSP hardware, leading to "desyncs" during the write process.

Go to your phone's Settings > Apps > PPSSPP > Permissions and ensure "Storage" or "Files and Media" is allowed.