wordpress - Fatal Error after WP Installations, is it a problem of wp-settings.php?

I am facing this error every week after I install
Wordpress.
I tried uploading a new wp-settings.php
file from GitHub but that doesn't seem to be working
too.

Error:

Warning:
require(/home/cntrlb8k/public_html/wp-includes/post.php):
failed to open
stream: Permission denied in
/home/cntrlb8k/public_html/wp-settings.php on
line 166

Warning:
require(/home/cntrlb8k/public_html/wp-includes/post.php):
failed to open
stream: Permission denied in
/home/cntrlb8k/public_html/wp-settings.php on
line 166

Fatal error: require():
Failed opening required

'/home/cntrlb8k/public_html/wp-includes/post.php'

(include_path='.:/opt/alt/php56/usr/share/pear:/opt/alt/php56/usr/share/php')

in /home/cntrlb8k/public_html/wp-settings.php on line
166