undefined method default_specifications_dir

  1. F

    Traceback (most recent call last):

    Traceback (most recent call last): 5: from <internal:gem_prelude>:1:in <internal:gem_prelude>' 4: from <internal:gem_prelude>:1:in require' 3: from /usr/local/lib/site_ruby/2.7.0/rubygems.rb:1372:in <top (required)>' 2: from /usr/local/lib/site_ruby/2.7.0/rubygems.rb:1372:in require'...