the theme could not be found after I modified the site from remote theme to Gem-based.

[WoogearKwon]

As I described in the title,
I modified _config.yml file that was originally remote_theme mode to Gem-based them mode.
After commit, github action showed me a log that's saying The minimal-mistakes-jekyll theme could not be found. with a bunch of other stuff that I couldn't understand.
Build log details are here

If I change it back to remote_theme enabled, it builds success.
FYI, local test had no problem.

What should I do to make it work with Gem-based theme?
Is there any possibility of Jekyll version incompatibility? I see that the version in Github log is jekyll-3.9.2 and my Gemfile is gem "jekyll", "~> 4.3.0".