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XF 1.5 Cant post with formatting


Active member
My site suddenly has an error with posting. If I write a post with no formatting, it posts fine. The moment I introduce formatting, even just changing the text colour, i get this:

Screen Shot 2017-05-06 at 10.04.20 pm.png

I am a few versions behind the latest release (running XenForo 1.5.10), would that be causing it? Cant quite afford to renew my license at the moment :(


XenForo moderator
Staff member
That's a web server error, typically caused by mod security.

Contact your host and they should be able to resolve it by whitelisting the rule or disabling it.