undefined method `process_message' for an instance of RubyLsp::Server (NoMethodError)

[jondavidschober]

Description

Apologizes for the low quality bug report. I really am not sure where to even start debugging this. It appears like there is some mismatch somewhere

2026-02-03 17:19:02.310 [info] (ai_assist) /Users/jondavidschober/.gem/ruby/3.3.0/gems/ruby-lsp-0.26.5/exe/ruby-lsp-launcher:172:in `rescue in <main>': undefined method `process_message' for an instance of RubyLsp::Server (NoMethodError)

  server.process_message(initialize_request)
        ^^^^^^^^^^^^^^^^
	from /Users/jondavidschober/.gem/ruby/3.3.0/gems/ruby-lsp-0.26.5/exe/ruby-lsp-launcher:152:in `<main>'
/Users/jondavidschober/.gem/ruby/3.3.0/gems/sorbet-runtime-0.6.12883/lib/types/private/methods/signature.rb:204:in `each_args_value_type': wrong number of arguments (given 1, expected 0) (ArgumentError)

[vinistock]

Thanks for the report. The process_message method definitely exists. It was added early in the project 2 years ago.

Could your ruby-lsp installation be modified on disk? Maybe a gem pristine will fix it?