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Ruby Ruby on Rails 5 Basics Creating an App Our First Resource

Issues with Rails on Mac with M1 Chip - NoMethodError in Posts#new

I'm totally stuck here. I've tried following the installation instructions and everything to the letter, but I'm on one of the MacBook Pro's with M1 chip, and nothing is working as they do in the videos. When I click "new post" I get:

NoMethodError in Posts#new Showing /Users/tluedeke/blog/app/views/posts/_form.html.erb where line #15 raised:

undefined method `deep_merge!' for {}:Concurrent::Hash Did you mean? deep_merge Extracted source (around line #15): 13 14 15 16 17 18

<div class="field"> <%= f.label :title %> <%= f.text_field :title %> </div>

Trace of template inclusion: app/views/posts/new.html.erb

Rails.root: /Users/tluedeke/blog

Application Trace | Framework Trace | Full Trace app/views/posts/form.html.erb:15:in `block in _app_views_postsform_html_erb986750044_2068' app/views/posts/_form.html.erb:1:in `_app_views_postsform_html_erb986750044_2068' app/views/posts/new.html.erb:3:in `_app_views_posts_new_html_erb__1616728586_2066' Request Parameters:

None Toggle session dump Toggle env dump Response Headers:


What can I do to move forward here?

What versions of Ruby and Rails are you using?