Ruby Blog Tutorial - ActionController::InvalidAuthenticityToken - ruby-on-rails

Question

I am completing the Ruby Rails tutorial for a blog and when I try and submit a new post I am getting a ActionController::InvalidAuthenticityToken error from the browser.
I am new to Ruby Rails (hence why I am doing the tutorial) and I have been back through the examples and have looked a various other answers etc and I cannot seem to find what the problem could be? I would like to understand the problem and how to fix it as part of learning.
This is what is shown in the extracted source :
def handle_unverified_request
raise ActionController::InvalidAuthenticityToken
end
end
end
This is from the Server :
Parameters: {"authenticity_token"=>"MijxdOhNKeov89oetl7Xa0KWpSZoeb3WAIuX0RECyIusjfjs/B5megtnH6JFOSG1G5K7g+csApABCn31UxdYGg==", "article"=>{"title"=>"po request"
, "text"=>"I want to buy some cheese"}, "commit"=>"Save Article"}
HTTP Origin header (https://3000-dot-4708054-dot-devshell.appspot.com) didn't match request.base_url (https://127.0.0.1:3000)
Completed 422 Unprocessable Entity in 1ms (ActiveRecord: 0.0ms | Allocations: 499)
ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):
And this is the .erb for a new record:
<%= form_with scope: :article, url: articles_path, local: true do |form|
%>
<% end %>
<%= link_to 'Back', articles_path %>
<%= form_with scope: :article, url: articles_path, local: true do |form|
%>
<p>
<%= form.label :title %><br>
<%= form.text_field :title %>
</p>
<p>
<%= form.label :text %><br>
<%= form.text_area :text %>
</p>
<p>
<%= form.submit %>
</p>
<% end %>

Answer 1

The authenticity token is used by rails to ensure that requests come from the site rails is expecting. When it generates a form, it includes the verification token for this purpose. There's a much better explanation of the history / why it's used here:
Understanding the Rails Authenticity Token
If you want to keep the checks in, then the short answer is to include
<%= form_authenticity_token %>
In any views that generate forms. This will ensure the correct token is in the form, and prevent the error from occuring