Came across this error after publishing the Kunena forum plugin for Community Builder(CB) in Joomla. When you clicked the forum tab on the CB profile page, and tried to unsubscribe from forum threads, I got a  appearing at the top of the page and nothing else.
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This issue occurred, why I still don't know, but the text boxes for replying to threads, messages and comments were all showing up as plain text areas with no buttons as would be normal in WYSIWYG editors.
