uninitialized constant Jekyll::Filters::DateFilters

After a massive update on my personal computer, I was no more able to run the local instance of this blog. In particular, there was an error related to Jekyll, as shown below:

% bundle exec jekyll serve
Traceback (most recent call last):
        9: from /usr/local/bin/jekyll:23:in `<main>'
        8: from /usr/local/bin/jekyll:23:in `load'
        7: from /var/lib/gems/2.7.0/gems/jekyll-3.4.5/exe/jekyll:6:in `<top (required)>'
        6: from /var/lib/gems/2.7.0/gems/jekyll-3.4.5/exe/jekyll:6:in `require'
        5: from /var/lib/gems/2.7.0/gems/jekyll-3.4.5/lib/jekyll.rb:36:in `<top (required)>'
        4: from /var/lib/gems/2.7.0/gems/jekyll-3.4.5/lib/jekyll.rb:82:in `<module:Jekyll>'
        3: from /var/lib/gems/2.7.0/gems/jekyll-3.4.5/lib/jekyll.rb:82:in `require'
        2: from /usr/lib/ruby/vendor_ruby/jekyll/filters.rb:5:in `<top (required)>'
        1: from /usr/lib/ruby/vendor_ruby/jekyll/filters.rb:6:in `<module:Jekyll>'
/usr/lib/ruby/vendor_ruby/jekyll/filters.rb:9:in `<module:Filters>': uninitialized constant Jekyll::Filters::DateFilters (NameError)
Did you mean?  DateTime

I therefore decide to remove the packaged version of Jekyll (that was 3.1-something with regard to 3.9 currently available) and also Ruby, so to start over a very clean environment:

% apt remove jekyll
% apt remove ruby
% apt install ruby
% sudo gem install bundler

Then, of course, I installed all the dependencies for the static site content:

% bundle install
% bundle update

and finally I was able to serve this blog on my local machine again!
It happens to me more and more ofter: (K)Ubuntu is messing up my environment and is not able to handle updates in a proper way. I was using Kubuntu 20.04, and I have updated all my stuff quite regularly but in the last months I have been away from the keyboard, and this could have been produced an invalid all-in-one update.
Or maybe it could be the update done via Discover.
Or I don’t know…

The article uninitialized constant Jekyll::Filters::DateFilters has been posted by Luca Ferrari on January 10, 2021