Just activate and get this errors

Warning: scandir(/home/user/domain.com/wp-content/wp-resources-back/) [function.scandir]: failed to open dir: No such file or directory in /home/user/domain.com/wp-content/plugins/wp-resources-url-optimization/wp-resources-url-optimization.php on line 184 Warning: scandir() [function.scandir]: (errno 2): No such file or directory in /home/user/domain.com/wp-content/plugins/wp-resources-url-optimization/wp-resources-url-optimization.php on line 184 Warning: array_diff() [function.array-diff]: Argument #1 is not an array in /home/user/domain.com/wp-content/plugins/wp-resources-url-optimization/wp-resources-url-optimization.php on line 184 Warning: Invalid argument supplied for foreach() in /home/user/domain.com/wp-content/plugins/wp-resources-url-optimization/wp-resources-url-optimization.php on line 185 What this it mean? Will it work? (replaced in output actual username/domain with “user/domain.com”) http://wordpress.org/extend/plugins/wp-resources-url-optimization/ Thanks for your feedback. The warning appears only in the first installed. Now, I’ve fixed it. Please update to latest version. Thanks.