Well, based on the error, Autoptimize cannot write the optimized files to the cache-folder due to configuration on the server (apparently set in php_prevent_flock.php).
Can you check with you hoster to see what is happening there?
Well, based on the error, Autoptimize cannot write the optimized files to the cache-folder due to configuration on the server (apparently set in php_prevent_flock.php).
Can you check with you hoster to see what is happening there?