This page isn’t workinglocalhost is currently unable to handle this request. HTTP ERROR 500 code example

Example 1: This page isn’t working localhost is currently unable to handle this request. HTTP ERROR 500

This page isn’t workinglocalhost is currently unable to handle this request.
HTTP ERROR 500

Example 2: this page isn't working http error 500 codeigniter

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /home/folder1/public_html

    #Removes access to the system folder by users.
    #Additionally this will allow you to create a System.php controller,
    #previously this would not have been possible.
    #'system' can be replaced if you have renamed your system folder.
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]
    
    #When your application folder isn't in the system folder
    #This snippet prevents user access to the application folder
    #Submitted by: Fabdrol
    #Rename 'application' to your applications folder name.
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #Checks to see if the user is attempting to access a valid file,
    #such as an image or css document, if this isn't true it sends the
    #request to index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
</IfModule>  

<VirtualHost *>
        ServerName abcdev.com.au/
        DocumentRoot /home/folder1/public_html/abc
        <Directory /home/folder1/public_html/abc>
                RewriteEngine On
                RewriteBase /
                RewriteCond %{REQUEST_FILENAME} !-f
                RewriteCond %{REQUEST_FILENAME} !-d
                RewriteRule ^(.*)$ index.php/$1 [L]
        </Directory>
</VirtualHost>