diff --git a/app/controllers/main_controller.rb b/app/controllers/main_controller.rb
index 244b7f540..55948c6aa 100644
--- a/app/controllers/main_controller.rb
+++ b/app/controllers/main_controller.rb
@@ -19,7 +19,8 @@ class MainController < ApplicationController
 
       uid_logger("main start is #{cookies[:_educoder_session]}")
     end
-    if params[:path] && params[:path].split("/").first == "educoderh5"
+
+    if params[:path]&.include?("educoderh5") && params[:path].split("/").first == "educoderh5"
       render file: 'public/h5build/index.html', :layout => false
     else
       render file: 'public/react/build/index.html', :layout => false