Spatie Translatable Filament Php File Upload Error (No synthesizer found for key: "")

I use the filament php in my laravel project. I wanted to use the localization package of spatie (filament/spatie-laravel-translatable-plugin) . I have 3 languages, (en, ru and de) for translatable. When i upload the image for en, the image was uploaded successfully. But i choosed the language for de, then i have tried to upload the image i have encountered the error.

No synthesizer found for key: ""