在子域Codeigniter 3中路由到子文件夹时出错404

I just managed to route to the controller in the subfolder after i got this solution. Everything works fine when on local computer. When run on hosting, the "404" error message appears.

I'm just newbie, don't know where missed

Here some info :

Local : Apache 2.4.34; PHP 5.6.38
Hosting : Apache 2.4.35; PHP 5.6.38

Local address : hris.localhost.co.id
Live address : hris.sbmgrp.co.id

Here my folder

- public html
   |-- hris  <-- **subdomain folder** 
   |    |-- application
   |    |    |-- controllers
   |    |    |    |-- user
   |    |    |    |    |-- Auth.php
   |    |    |    |    |-- Dashboard.php
   |    |    |    |-- Welcome.php
   |    |    |-- core
   |    |         |-- MY_Router.php
   |    |-- .htaccess 
   |-- helpdesk <-- other subdomain
   |    |-- .htaccess
   |-- .htaccess.php

MY_Router.php sames as this.

.htaccess (hris)

<IfModule mod_rewrite.c>

  Options +FollowSymLinks
  RewriteEngine On
  RewriteBase /hris/

  # If your default controller is something other than 'welcome' you should probably change this.
  RewriteRule ^(welcome(/index)?|index(\.php)?)/?$ / [L,R=301]
  RewriteRule ^(.*)/index/?$ $1 [L,R=301]

  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ /index.php/$1 [L]

  SetEnvIfNoCase X-Forwarded-For .+ proxy=yes
  SetEnvIfNoCase X-moz prefetch no_access=yes

  # Block pre-fetch requests with X-moz headers.
  RewriteCond %{ENV:no_access} yes
  RewriteRule .* - [F,L]

  # Fix for infinite redirect loops.
  RewriteCond %{ENV:REDIRECT_STATUS} 200
  RewriteRule .* - [L]

</IfModule>

.htaccess in public_html

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L] 

When i try set $router[default_controller] = 'welcome' , its works normally. If any other issue please let me know. Thanks for your advice.