Sylvia and the Ghost
Sylvie et le fantôme (original)
Starring Odette Joyeux, François Périer, Pierre Larquey, Claude Marcy, Jean Desailly, Paul Demange, Marguerite Cassan, Rognoni, Gabrielle Fontan, Jacques Tati
It's a fantasy and comedy movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.