Visual Editor not working – ReferenceError: switchEditors is not defined

I have been having this problem for over a week now, and not sure what triggered it. I have found other forum questions with this same issue, but nobody seems to have a working resolution (at least nothing that’s worked for me). I am not able to switch to the visual editor or use the add media button. Also, my menu item sub-lists aren’t floating consistently. I often have to click on the main navigation button (eg. Appearance) and then from that landing page, choose a sub menu item (eg. Editor). I don’t know if that is a separate issue or part of the same problem.

Website: exodusfitnessretreats.com/blog/

Here is the troubleshooting I’ve attempted:
1)Deactivated all plugins
2) Changed to Twenty Fourteen Theme
3) Opened dashboard in another browser program
4) Cleared cookies and cache from browser
5) Verified that the <?php wp_footer(); ?> tag is just above the </body> tag in footer.php
6) Re-uploading wordpress files from a new wordpress download
It seems like I’ve tried a lot more than that, but those are the main things other forums have suggested.
7) I’ve read that other people have had issues with jquery, but I wouldn’t know how to troubleshoot that or fix it.

Here is the error message I getting from Firebug:
ReferenceError: switchEditors is not defined
https://www.exodusfitnessretreats.com/blog/wp-admin/post.php?post=26&action=edit
Line 1

I’m also getting this error above the switchEditor error. I don’t know if it’s part of this issue or creating a domino effect:
SyntaxError: missing ) after argument list
https://www.exodusfitnessretreats.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=hoverIntent,common,admin-bar,schedule,wp-ajax-response,autosave,jquery-color,wp-lists,quicktags,jquery-query,admin-comments,sugg&load%5B%5D=est,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,postbox,heartbeat,post,editor-expand,thickbox,underscore,&load%5B%5D=shortcode,backbone,wp-util,wp-backbone,media-models,wp-plupload,mediaelement,wp-mediaelement,media-views,media-editor,media-audi&load%5B%5D=ovideo,wp-playlist,mce-view,imgareaselect,image-edit,svg-painter,wp-auth-check,word-count,editor,wplink,wp-fullscreen,media-uplo&load%5B%5D=ad&ver=4.0.1
Line 88

If anyone has any suggestions, I would be very very appreciative.

Thank you!