This is a library, which resolves incompatibility of solargraph-rails with Rails 7.1.
See this issue for more datails.

Install the gem and add to the application's Gemfile by executing:

$ bundle add solargraph-rails-patch-for-rails71

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install solargraph-rails-patch-for-rails71

Update your .solargraph.yml as follows:

plugins:
- solargraph-rails
- solargraph-rails-patch-for-rails71  # Add this line

The gem is available as open source under the terms of the MIT License.