Colab Enterprise in VPC Service Controls

I want to use bigquery notebooks in VPC Service Controls.

I tried below page solution and currently it seems good without one javascript error

https://cloud.google.com/colab/docs/service-controls

When I run notebook cell, notebook ui says that I couldn't load response javascript.

From chrome inspect it tries to load for outputframe.html for colab-cloud.googleusercontent.com

I added this dopmain to cloudDNS to send restricted.googleapis.com but failed.

Do you have any idea to fix it?