For my main site, https://hb.test/_error/404 works fine.
However, for the other site https://hart.test/_error/404 under the same repo,
Symfony Profiler shows that themes/hb/templates/bundles/TwigBundle/Exception/error404.html.twig was rendered instead of themes/hart/templates/bundles/TwigBundle/Exception/error404.html.twig.

What can I do to have the hart folder’s error404.html.twig template to be rendered?

I have checked if I named any folders wrongly but it wasn’t the case. Any pointers would be much appreciated!