Help me pls..

Guys hi, please help to solve the problem Fatal error: Call to a member function get_author_permastruct() on null in C:\openserver\OSPanel\domains\localhost\wp-includes\author-template.php on line 337 here is itself string $link = $wp_rewrite->get_author_permastruct(); I a newbie WP, already 3 days not can solve problem this,not lampooned in administrative console. Thank you in advance

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