php - WordPress Error after update -

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after updating wordpress website received following error message whenever attempt login admin area.

fatal error: cannot redeclare add_object_page() (previously declared in /home/nichea5/mausmedia.net/mm1/wp-admin/includes/plugin.php:1101) in /home/nichea5/mausmedia.net/mm1/wp-admin/includes/deprecated.php on line 1342

any appreciated.


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