PHP Error on my website [closed]

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I installed Wallpaper Script on my domain but it gives this error on the page :

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Can anyone help? Site is http://hotwa开发者_开发技巧llpapers.pk

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Sounds like an Apache error resulting from a malformed or otherwise invalid .htaccess file. I recommend checking your error.log file, wherever it resides. /var/log/httpd/error.log in some distributions.)