local works but on live server (godaddy) doesn't work

Whenever you get a 500 error, the best thing to do to save everyone time, is to check your server's error logs. CPanel and Plesk both have ways to do this from the control panel, IIRC. The error should show up.

Additionally, you can make sure that errors are turned on (see the main index.php page) to show you all of the errors that it can.

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