Error on change Bloom intensity with Cinemachine + Post Processing

Hello everyone!

I use Unity 2019 and ever use the package manager to give Cinemachine and Post Processing (v2)

I'm trying to access the Bloom effect and change its intensity value.

I don't get errors in Visual Studio or Unity on standby, but when I go to test, the Unity gaves me this error:

My code is like...

Error on change Bloom intensity with Cinemachine + Post Processing