fixed bug when use include? in nil class

app/controllers/applies_controller.rb

@@ -2,7 +2,7 @@ class AppliesController < ApplicationController
   before_action :load_job, only: %i[new confirm create]
   before_action :load_job, only: %i[new confirm create]
 
 
   def new
   def new
-    @apply = if request.referer.include?('confirm') && session[:apply_job].present?
+    @apply = if request.referer&.include?('confirm') && session[:apply_job].present?
                ApplyJob.new(session[:apply_job])
                ApplyJob.new(session[:apply_job])
              else
              else
                current_user.apply_jobs.build
                current_user.apply_jobs.build