XF 2.0 Fail on quoting anyting with a smilie etc - and can't update anything HTML backend?

[SEOmers]

I'm getting reports that members can't quote if someone uses a Smilie etc -

I'm also finding the same error if I try to update HTML on a widget etc?

The only thing I've done is an update to the latest version of Xenforo?

Trouble is, I can't see what the problem is?

Although I am getting this

 

[TPerry]

You need to show the entire stack trace for those errors. Just click on them and they will expand and then put what is there into a code box.

 

[Paul B]

I'm going to guess it's mod sec - we've seen many instances of it recently.

If you check the browser console (F12) you may see an error message related to forbidden access.

If that is the case, you will need to contact your host and ask them to disable mod sec or whitelist whichever rule is being triggered.

For the ACP errors - I believe that's related to a third party add-on.