Issue: WYSIWYG editor missing?

This was related to .htaccess rules on sub-domains hijacking AJAX features: https://www.vaultwiki.org/issues/2702/
Marked as Duplicate.

Still not getting the WYSIWYG editor when editing wiki article....

Possibly related - If we preview a wiki article after editing, the text in the editor loses all line breaks and formatting. The bbcode tags are still there, but all of the paragraphs run together with no line breaks between them....

Please PM me a test user login of a user with edit permissions. Guest users can edit but don't use WYSIWYG so I can't see what's happening.

I got the toolbar, eventually. The test user had last logged into the main site before DST changed, which means that the site will try to internally redirect to a page that changes the DST setting. However, your wiki.subdomain is not included in your site's referrer whitelist, so the POST to the non-wiki.subdomain was rejected and this caused a number of items that require POST submission tunneled to that domain, including the editor toolbar WYSIWYG activation, to be broken while viewing the sub-domain.

Once I simply visited a page on the main domain, the DST setting reset, and returning to a wiki page and the editor loaded the WYSIWYG toolbar as expected. To avoid this issue for other users, I would add your wiki sub-domain to your site's referrer whitelist (in vBulletin's settings, and also vBSEO's settings if you use that product).