Help please ! Unknown cook failure

Hi everyone! I have this error each time I try to package my project, “unknown cook failure”.
You can find the lofs attached :slight_smile:
Does someone know how I can fix this?

Many thanks!

I think problem is here
LogProperty: Error: UStructProperty::Serialize Loading: Property ‘StructProperty /Game/UI/Sauvegarde.Sauvegarde_C:Achievements.Achievements’. Unknown structure.
UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogBlueprint: Error: [Compiler Sauvegarde] The variable Achievements declared in Sauvegarde has an invalid type Array of Structures from Source: /Game/UI/Sauvegarde.Sauvegarde