Unexpected token ILLEGAL, even on clean install – jquery-issue?

It looks to me like you’re trying to utilize jQuery in custom code, but haven’t actually enqueue’d the jQuery script – This line gives it away (I think?):

ReferenceError: jQuery is not defined

if you are using wp_enqueue_script to bring in a custom .js file, make sure you set jquery as a dependancy

wp_enqueue_script( 'my-script', get_stylesheet_directory_uri() . '/js/myfile.js', array( 'jquery' ) );