Problem after upgrading to WP 3.9
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I met the following errors right after upgrading to WP 3.9:
Warning: mysql_query(): Access denied for user ”@’localhost’ (using password: NO) in D:\MySite\wp-content\plugins\wp-optimize\wp-optimize-common.php on line 332
Warning: mysql_query(): A link to the server could not be established in D:\MySite\wp-content\plugins\wp-optimize\wp-optimize-common.php on line 332
Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\MySite\wp-content\plugins\wp-optimize\wp-optimize-common.php on line 333
Interestingly, I tried other database optimzing plugins with the same errors.
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