Kong Manager not loading data in DB less mode on air-gapped environment

I installed Kong KIC on my air-gapped environment Enabled Kong Manager in the Openshift , and I am accessible Kong Manage UI through Openshift route URL
But when I click any resource its showing below error.
Data cannot be displayed due to an error.

via my browser debug mode I see bunch of failed to load resources which seems like the Kong manager trying to access https://buttons.github.io/ which I don’t have access to from my environment.

any way we can fix this or work around it ?

Kong Manager not loading data in DB less mode