Hi @ grace136! Unfortunately, in this impossible to preview the solution in this kind of puzzles. Please, make a screenshot of the picture with the missing piece and post it in the comments (but make sure you hide it under a spoiler) so other users could help you out.
Si vous avez trouvé une traduction inexacte ou erronée des éléments de l'interface du site, veuillez nous en informer: @GrandGames