Серость в админке

Началось с того, что сайты на VPS атаковали вирусы. Пришлось восстановиться с довольно старого бэкапа. При этом всё стало криво в шаблоне, потом обновил версию WP и в результате вот так выглядит сейчас админка и ошибка
Ничего не помогает. На секунду появляется и закрывается серым покрывалом)

Вот полный текст ошибок:

JQMIGRATE: Migrate is installed, version 1.4.1
load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3 Uncaught DOMException: Failed to execute 'insertBefore' on 'Node': The new child element contains the parent.(…)(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3Ha @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3after @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3n.fn.(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:2i @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2fireWith @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2ready @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2K @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2
load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246 Uncaught TypeError: Cannot read property 'hasClass' of undefined(…)(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246dispatch @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3r.handle @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3a.event.trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:9(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:245i @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2fireWith @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2y @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4c @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4
load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246 Uncaught TypeError: Cannot read property 'hasClass' of undefined(…)(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246dispatch @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3r.handle @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3a.event.trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:9(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:245i @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2fireWith @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2y @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4c @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4
load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246 Uncaught TypeError: Cannot read property 'hasClass' of undefined(…)(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246dispatch @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3r.handle @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3a.event.trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:9(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:245i @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2fireWith @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2y @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4c @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4
load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246 Uncaught TypeError: Cannot read property 'hasClass' of undefined(…)(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:246dispatch @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3r.handle @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3a.event.trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:9(anonymous function) @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2each @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2trigger @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:3(anonymous function) @ load-scripts.php?c=0&load[]=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,unders…:245i @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2fireWith @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:2y @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4c @ load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils,plupload&ver=4.6.1:4