Critical Error only when posting comments

Hi all, users are getting a “critical error” message when posting comments to our site. I get it as well when I try to do the same, however, the comments still get posted and/or sent for moderation.

I’m not sure what’s causing this as we don’t have any overly weird plugins (though I haven’t deactivated and tried all), but any thoughts are appreciated.

**Again, it’s** ***only*** **when someone goes to post a comment.**


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