My .css and .js file is not rendered using webassets

[PoomrapeeS]

My.css file is not rendered according to the instructions in the theming guide at https://docs.ckan.org/en/2.10/theming/webassets.html. But using extra_public_paths with {% block custom_styles%} is worked.

base.html

plugin.py

webassets.yml (The default is commented. I give both a try, but there is no difference.)