Can't open foto library with FotoMagico

Before switching to MacOS Catalina I worked successfull with wFotoMagico in combination with an aperture picture library. Now I converted the aperture library to a foto library. Using FotoMagico inside the picture library viewer an entry “fotos” appears, but it’s not possible to open the structure of the library. Has anybody an idea?
Thanks in advance

the reason for this problem was the attribute “system library” of the fotos library. There was no existing archive with this attribute, so FotoMagico couldn’t handle any archive. After setting this attribute for the correct archive everything works fine.