Restarting app error (ruby 3.1.0): cannot load such file -- rexml/document

[lemig]

Hi

When I do:

passenger-config restart-app

I have the error: cannot load such file -- rexml/document
This happens with ruby 3.1.0. It's ok with ruby 2.6.0.

The raison is REXML is no longer in the Ruby Starting Library starting in ruby 3.0.0.
I suggest adding this to Gemfile:

if (Gem.available?("rexml"))
  gem "rexml"
end

[CamJN]

That doesn't work: [!] There was an error parsing 'Gemfile': undefined method 'available?' for Gem:Module. Bundler cannot continue.

[CamJN]

should be fixed in 6.0.14