I can't create a mask using tools

[Михаил36666619ycu1]

I create a composition, create a form, make a duplicate of it, click on the pen tool creation and for some reason the form is drawn, not the mask

[nishu_kush]

Welcome to the community, Михаил36666619ycu1.

Could you share more details about your workflow? If you're trying to create a mask on a Shape layer, that wouldn't be possible. Feel free to share screenshots or screen recordings. 

I'll move your post to the Discussions board while we await your information.

Thanks,

Nishu