/Users/me/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:289:in ``find_spec_for_exe': can't find gem rubocop (>= 0.a) with executable rubocop (Gem::GemNotFoundException) from /Users/me/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:308:in ``activate_bin_path' from /Users/me/.rbenv/versions/2.5.1/bin/rubocop:23:in'
这是我每次输入内容时都会遇到的错误。有谁知道如何解决这个问题？