Upgrading from cpg1.5.24 to 1.5.26

Error:

Warning: require_once(include/inspekt/error.php): failed to open stream: Permission denied in /srv/www/htdocs/adonismale/charly/include/inspekt.php on line 33 Fatal error: require_once(): Failed opening required 'include/inspekt/error.php' (incl...