I'm trying to rebuild our website after the JCE vulnerability attack earlier in June. I've used Floox for several years. I was building a menu that has 3 columns of links, all URLs leading to local PDF files. I created the menu headings for each of the columns, placed them all under a root menu heading. At first, the first column was filling in fine, but the second column started to fill in under the first, and I hit the "reset" button to try and rebuild the helix menu, which just results in this error message:

{"action":"none","status":"false","message":"The most recent request was denied because it had an invalid security token. Please refresh the page and try again."}

and now none of the sub menu items display at all. I also tried the joomla "rebuild" option, but nothing changed.

Thanks!