Could not say exactly when the error occurred, since as an admin I do not see the error. But since I could add a topic before the WP update from 3.9 to 4.0 (my current version) and your subsequent version update to Version 5.5.1 (my current version). I would say sometime in that time range, but it could also be after your plugin updates as well. Sorry I could not be more specific but we just started pre-launch testing and only now have I been testing all user levels in the forum.
My error is almost exactly like the problem described in the previous topic (except he never mentioned if as an admin he could add a topic) but I too see the javascript:void(null) on the “Add Topic” when I hover over the link, and the problem is corrected with a theme change and with all other things being the same, I assumed it was a theme error. Reading the Codex article “I am seeing javascript:void(null) for a browser link” suggested no concrete solution either. I also found no other forum topics or articles that came close to describing the problem as I am experiencing it either. Please advise on where else you would suggest I look for the solution.
Also, I do not know if it matters but I do have a number of your plugins added to my site as listed below:
Admin Bar Version 1.4.8
Announce Version 1.0.4
Ban Version 1.0.7
Captcha Version 1.3.6
Editor TinyMCE Rich Text Version 3.0.6
Featured Topics and Posts Version 1.0.6
File Uploader with Plupload Version 4.0.1
Font Resizer Version 1.2.1
Gravatar Cache Version 1.2.3
Maintenance Mode Version 1.0.2
Policy Documents Version 1.3.6
Post Preview Version 1.2.4
Post Ratings Version 1.5.1
Post Thanks Version 2.1.5
Private Message System Version 2.1.4
Profanity Filter Version 1.2.3
Profile Display Control Version 1.0.4
Prune Database Version 1.1.8
Remove Spam Registrations Version 1.1.10
Subscriptions Version 1.4.5
Tags Version 1.3.15
Template Tags and Widgets Version 1.4.4
Topic ID Permalink Version 1.0
Topic Status Version 1.2.9
Uploads Viewer Version 1.1.6
Warnings and Suspensions Version 1.1.2
Watches Version 1.5.4
Who’s Online Version 1.2.7
The link is http://www.lawfulmoneytrust.com/wp-admin but as it is in maintenance mode so I have sent you Admin login details in a pm.
Thanks Greg