If you are still experiencing problems and are looking in your error logs you can check out the PHP errors below for more information.There can be a number of reasons for an Internal Server Error. If you are sure your configuration is correct you could try resetting your My SQL password manually. The following hosting issues may be causing the problem: for errors, and confirmed with your host for hosting issues, it is possible that your site has been hacked.
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This page lists the most common Word Press errors experienced by Word Press users, and provides a starting point for fixing them.