Causes errors to appear on every admin page.

  • When i install plugin : Media Center Extensions. it appear
    Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘TransferOutBeforeUpgrade’ not found or invalid function name in /Applications/XAMPP/xamppfiles/apps/wordpress/htdocs/wp-includes/class-wp-hook.php on line 298
    Can everyone help me? ??
    Thanks so much

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  • Please Follow the steps written below.

    1) disable the plugin,
    2) delete it completely
    3) install again.
    If you install cache plugin,
    4) clear all caches.

    Also, change line in your wp-config.php file:
    define( ‘WP_DEBUG’, false );

    – Still, if this error is coming, then update the latest WordPress Version 4.8.1

    Thanks.

Viewing 1 replies (of 1 total)
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