Can see the document tree, but right side is blank when trying to edit.

I have an old site still running on Evolution (1.0.15)

Most of the Manager loads fine except for trying to edit pages. When clicking on a page in the document tree the right column where the editor would be is just a blank white page. No updates have been made to the site in quite a while. If I right click and try to view source it says "This software requires a browser with support for frames." However, the rest of the pages/frames load fine, chunks, templates, options, etc.

Viewing console I see:
Source map error: request failed with status 404 Resource URL: http://www.canfieldjoseph.com/assets/plugins/managermanager/js/jquery-1.9.1.min.js Source Map URL: jquery.min.map

Do you think Manager Manager needs to be updated?

Thanks,
Steve

Would be smart to update to the latest version 1.4.8.
Maybe PHP is updated on the server.