Hello-

I've got a few too many variables to pinpoint the cause, but I've recently updated to 5.4.2.1 and installed the Example FAQ addon and created a new page type and custom attribute to hide the "read more" link using these instructions:http://www.concrete5.org/marketplace/addons/example-faq/questions-a...

Now, no matter which page I'm on, or which browser I use, I am unable to insert a table, use the HTML button, insert a link, or basically use any function that uses a popup box. Instead of the correct popup box, I get a box that says "unable to find page." I've attached a screenshot.

Any help or pointing in a direction to look would be greatly appreciated!!