Post Editor Quit Working – jQuery Won't Execute

All,

I’ve seen related posts to this problem, but none of the posts have given me a solution. My post editor will not allow me to pull up the Add Media lightbox, nor can I toggle between plain text and WYSIWYG.

The following appears in the developer console:

jquery.js:6 Uncaught SyntaxError: Unexpected end of input
jquery-migrate.min.js:2 Uncaught SyntaxError: missing ) after argument list
core.min.js:11 Uncaught SyntaxError: Unexpected token ILLEGAL
widget.min.js:11 Uncaught ReferenceError: jQuery is not defined
position.min.js:11 Uncaught ReferenceError: jQuery is not defined
tooltip.min.js:11 Uncaught ReferenceError: jQuery is not defined
tooltip_init.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
/wp-includes/js/wp-emoji-release.min.js?ver=4.4.2:4 Uncaught SyntaxError: Unexpected token ILLEGAL
load-scripts.php:30 Uncaught SyntaxError: Unexpected token ILLEGAL
js.js:228 Uncaught SyntaxError: Unexpected token ILLEGAL
selectize.min.js:3 Uncaught SyntaxError: Unexpected token ILLEGAL
admin-global.js:49 Uncaught SyntaxError: Unexpected token ILLEGAL
wp-seo-metabox-302.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
post-new.php:112 Uncaught ReferenceError: jQuery is not defined
post-new.php:242 Uncaught ReferenceError: jQuery is not defined
load-scripts.php:404 Uncaught SyntaxError: Unexpected token ILLEGAL
wp-seo-admin-global-302.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
wp-seo-admin-media-302.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
yoast-seo-307.min.js:6 Uncaught SyntaxError: Unexpected token ILLEGAL
wp-seo-post-scraper-305.min.js:1 Uncaught ReferenceError: jQuery is not defined
wp-seo-replacevar-plugin-302.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
jquery.qtip.min.js:4 Uncaught SyntaxError: Unexpected token ILLEGAL
wp-seo-featured-image-302.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
shortcode-ui.min.js:1 Uncaught SyntaxError: Unexpected token ILLEGAL
post-new.php:3378 Uncaught ReferenceError: QTags is not defined
wp-tinymce.php:41 Uncaught ReferenceError: getUserSetting is not defined

The jQuery functionality in the dashboard seems to be limited with other plugins, too.

I really need help here…