wp-admin/theme-install.php

Acabei de instalar a versão 5.4.1, quando entro em instalar novo tema aparece a mensagem não carrega nada, e no console mostra as mensagens abaixo

Também não consigo personalizar o tema padrão Twenty Twenty, fica tudo cinza

Uncaught SyntaxError: Unexpected token ‘<‘
load-scripts.php?c=0&load[chunk_0]=hoverIntent,common,hoverintent-js,admin-bar,underscore,backbone,wp-util,wp-backbone&ver=5.4.1:18 Uncaught SyntaxError: Unexpected token ‘<‘
customize-base.min.js?ver=5.4.1:2 Uncaught ReferenceError: jQuery is not defined
at customize-base.min.js?ver=5.4.1:2
(anonymous) @ customize-base.min.js?ver=5.4.1:2
theme.min.js?ver=5.4.1:2 Uncaught ReferenceError: jQuery is not defined
at theme.min.js?ver=5.4.1:2
(anonymous) @ theme.min.js?ver=5.4.1:2
updates.min.js?ver=5.4.1:2 Uncaught ReferenceError: jQuery is not defined
at updates.min.js?ver=5.4.1:2
(anonymous) @ updates.min.js?ver=5.4.1:2
svg-painter.js?ver=5.4.1:241 Uncaught ReferenceError: jQuery is not defined
at svg-painter.js?ver=5.4.1:241
(anonymous) @ svg-painter.js?ver=5.4.1:241
heartbeat.min.js?ver=5.4.1:2 Uncaught ReferenceError: jQuery is not defined
at heartbeat.min.js?ver=5.4.1:2
(anonymous) @ heartbeat.min.js?ver=5.4.1:2
wp-auth-check.min.js?ver=5.4.1:2 Uncaught ReferenceError: jQuery is not defined

A página que eu preciso de ajuda: [fazer login para ver o link]