Cara menampilkan menu setting pada public identifier plugins

Hello everyone
I want to ask how to activate the doj on ojs because in my journal there is no display setting on doi in Ojs 2.4.8 oke

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Refresh this page, then look in the PHP error log for any relevant errors. Share them here.

can you help me find the wrong coding php

Your webserver will generate an access log and a PHP error log. If you are hosted via a department or institution, as your system administrator to help with capturing the PHP error log at the time of your use of this page. If you are hosted by a service provider, ask their technical support how you would access the PHP error log.

Can anyone help me how to configure email in ojs using php mail
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