FIXED
Go to plugins/safe-search-replace/Ssr.php
Change line 11 from…
define ('SSR_PATH_DATA', dirname(__FILE__).'/../safe-search-replace-data');
to…
define ('SSR_PATH_DATA', dirname(dirname(__FILE__)).'/safe-search-replace-data');
The issue is that the ../ isn’t an accepted method of directory traversal, using dirname() twice is much more reliable way of fetching the parent directory.