Ratchet & Clank: Size Matters

[raphaelpro54]

Hello everyone . Sorry if i write mistakes because i'm French.
I am encountering a issue with PPSSPP, in the game Ratchet & Clank - Size Matters in the planet named Kalidon. The problem is that when I go to the skyboarder challenges to get the "Shrink ray", when I enter in a challenge, the game just stuck at this screen (for 10 minutes now) :
   
I'm using a dumped .ISO from my PSP, and I have the French version. If you have a idea on how to fix it, i will be extremely greatful ... because if i can't pass these challenges, i can't continue the game and i am doing a Let's Play on it
Thanks

Note : I have added a screenshot of the debugging console of PPSSPP