Cocoapods Traceback 在 41 个 gem 中找不到 'json' (>= 1.5.1) (Gem::MissingSpecError)

Question

我最近通过 Homebrew 安装了 cocoapods，安装后我想运行或安装 pods，一旦我在终端中执行 pod 命令，它就会显示以下错误。

Traceback (most recent call last):
    16: from /usr/local/Cellar/cocoapods/1.10.0/libexec/bin/pod:23:in `<main>'
    15: from /Library/Ruby/Site/2.6.0/rubygems.rb:297:in `activate_bin_path'
    14: from /Library/Ruby/Site/2.6.0/rubygems.rb:297:in `synchronize'
    13: from /Library/Ruby/Site/2.6.0/rubygems.rb:298:in `block in activate_bin_path'
    12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1371:in `activate'
    11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `activate_dependencies'
    10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `each'
     9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1403:in `block in activate_dependencies'
     8: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1371:in `activate'
     7: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `activate_dependencies'
     6: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `each'
     5: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1403:in `block in activate_dependencies'
     4: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1371:in `activate'
     3: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `activate_dependencies'
     2: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1389:in `each'
     1: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1400:in `block in activate_dependencies'
/Library/Ruby/Site/2.6.0/rubygems/dependency.rb:311:in `to_specs': Could not find 'json' (>= 1.5.1) among 41 total gem(s) (Gem::MissingSpecError)
Checked in 'GEM_PATH=/Users/mustafaalkhazraji/.gem/ruby/2.6.0:/Library/Ruby/Gems/2.6.0:/usr/local/Cellar/cocoapods/1.10.0/libexec:/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0', execute `gem env` for more information