php - Wordpress down - no changes

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Wordpress website went down without
any changes.

Here are the error
messages:

Warning:
include(/home/theme/public_html/wp-content/themes/sachba/functions.php): failed to open
stream: Permission denied in /home/user/public_html/wp-settings.php on line
425

Warning: include(): Failed opening
'/home/sachbaco/public_html/wp-content/themes/theme/functions.php' for inclusion
(include_path='.:/opt/cpanel/ea-php56/root/usr/share/pear') in
/home/user/public_html/wp-settings.php on line 425

Warning: Cannot modify header information - headers already sent by (output
started at /home/user/public_html/wp-settings.php:425) in
/home/user/public_html/wp-includes/pluggable.php on line
1195

Any help
please?

Answer

try setting permission on
/home/user/public_html/wp-settings.php to 777 and try again. if it works then you must
lower the permissions one by one until the error appears. *Do not leave wp-settings.php
on 777 for a long time.