Don't crash if email verification origin not set

Author: nygrenh

app/controllers/users_controller.rb

@@ -88,7 +88,7 @@ def confirm_email
     language = params[:language]
     token = VerificationToken.email.find_by!(user_id: params[:user_id], token: params[:id])
     redirect_path = root_url
-    redirect_path = "https://course.elementsofai.com/#{language ? "#{language}/" : ''}email-verification" if params[:origin].start_with?('elements_of_ai')
+    redirect_path = "https://course.elementsofai.com/#{language ? "#{language}/" : ''}email-verification" if params[:origin] && params[:origin].start_with?('elements_of_ai')
     User.find(params[:user_id]).update!(email_verified: true)
     redirect_to redirect_path, notice: 'Your email address has been verified!'
   end