title: Issues with zsh after upgrading OSX to Catalina
body: <p>After upgrading my mac to Catalina, i have changed my shell from bash to zsh and when i try to run brew doctor or brew cleanup i receive a load error:</p>
  
  <p>cannot load such file -- active_support/core_ext/object/blank (LoadError)</p>
  
  <p>Im having other anomalies as well due to the change of shell. I have updated my .zprofile to reflect what was in my .bash_profile when i was using bash. </p>
  
  <p>Any way i can get brew up and running again properly and what steps can i take to make sure zsh runs just like bash?</p>
  
  <pre><code>brew doctor
  
  dc@PandaMacPro ~ % brew cleanup
  Traceback (most recent call last):
      4: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `&lt;main&gt;'
      3: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `require_relative'
      2: from /usr/local/Homebrew/Library/Homebrew/global.rb:13:in `&lt;top (required)&gt;'
      1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- active_support/core_ext/object/blank (LoadError)
  </code></pre>