Problem with Rin Editor "CKEDITOR is not defined"

I've been using rin editor on my board for quite a while because I find that it offers everything I need + never had any bugs with it.
I'm unsure how to fix this, when accessing new conversation or reply, I get this error

First a warning

jQuery.Deferred exception: CKEDITOR is not defined ReferenceError: CKEDITOR is not defined

Then

Uncaught ReferenceError: CKEDITOR is not defined

    at Object.QuickReferences.init (rineditor.js:6)

    at HTMLDocument.<anonymous> (private.php:629)

    at l (jquery.js?ver=1821:2)

    at c (jquery.js?ver=1821:2)

I know that rineditor is adding to private_send and private_quickreply templates
{$rinbutquick} next to textarea

I did try to add {$rinbutquick} to symposium_conversation template next to textarea without success, maybe something needs to be modified in rineditor plugin ?
Rin editor: https://community.mybb.com/mods.php?action=view&pid=657

Any help to integrate it correctly is appreciated
Symposium can still be used with this error (textarea is basic but working).

This is an incompatibility with QuickReferences 1.2. Disable QuickReferences to solve. I'd need an URL to debug further and let them integrate seamlessly.