حل مشکل Fatal Error و footer.php is corrupted

سلام اخیرا سه اروربرای سایتم پیش اومده متاسفانه با آپدیت کردن دستی وردپرس و اپدیت افزونه ها مشکل حل نشد .ممنون میشم اگر میشه راهنمایی بفرمایید.
1-
Fatal error: Uncaught Error: Function name must be a string in /home3/naghshyn/public_html/wp-includes/author-template.php:1 Stack trace: #0 /home3/naghshyn/public_html/wp-settings.php(194): require() #1 /home3/naghshyn/public_html/wp-config.php(166): require_once(‘/home3/naghshyn…’) #2 /home3/naghshyn/public_html/wp-load.php(50): require_once(‘/home3/naghshyn…’) #3 /home3/naghshyn/public_html/wp-login.php(12): require(‘/home3/naghshyn…’) #4 {main} thrown in /home3/naghshyn/public_html/wp-includes/author-template.php on line 1
2-
Fatal error: Uncaught Error: Call to a member function set() on null in /home3/naghshyn/public_html/wp-includes/l10n.php:786 Stack trace: #0 /home3/naghshyn/public_html/wp-includes/l10n.php(874): load_textdomain(‘default’, ‘/home3/naghshyn…’, ‘fa_IR’) #1 /home3/naghshyn/public_html/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /home3/naghshyn/public_html/wp-includes/l10n.php on line 786
3- و مهمترینش
The file /home3/naghshyn/public_html/wp-content/themes/emperor-old/footer.php is corrupted.