There is not "Python Plugin Manager" feature for Krita

Sorry for bad English.

I install krita on Xubuntu 16.04 and Snap 2.38.

$ snap --version
snap    2.38
snapd   2.38
series  16
ubuntu  16.04
kernel  4.4.0-145-generic

Krita have a feature that called “Python Plugin Manager” or “pykrita”.

But Krita don’t show “Python Plugin Manager” in Configure Krita window and don’t identify “pykrita”. I can’t use Python Plugin in Krita installed with Snap, but this feature is available with appimage.

Is it a bug or i must do somthing for active that?

Does anyone have an idea?