HTTP 500 error with no error log (PHP, Codeigniter)

This link helped me to fixed it.

https://bobcares.com/blog/codeigniter-http-error-500/

CodeIgniter HTTP Error 500 - Easy ways to fix

 

1) Add .htaccess file

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

2) I changed mode of directory and files of root directory with following command

chmod -r 777 <myRootDir>