Why doesn't Yii2 work with components if they are implemented in a separate file and put into a separate namespace?

Question

Yii

Good afternoon!

Over the past hour, I've come across this:


A component I wrote does not want to work with the Yii2 component support library if it was put in a namespace.

How to make namespace in one file with components or models work? Thank you in advance and an example of the problematic code in the comments to this question!