Canvas blocked the main view [Not actuality]

Hello!

Tell me, please, what have I done wrong?

I made an inventory prototype using Canvas. When I open it, the view behind the inventory is not drawn in my MainCamera, although my inventory is a bit transparent.
MainView:


Canvas is activated:

Canvas settings:

Perhaps I did not attach all the necessary data, I am not good at this, I will be grateful if you say what is missing.

Not actuality