Help! I cannot post Pokémon Art Academy artwork directly on Miiverse.

[Shadao]

I have made artworks with Pokémon Art Academy and I normally post them through the in-game Miiverse function. But I have notice that other people have their artworks in the play journal and drawing sections. I have tried to directly go to these sections and post my artworks there but every time I do, Miiverse won't allow me because it states it cannot attach pictures. This has never gone away, and people on Miiverse are either not helpful or are having the same problem.