I am / was using the /paviliondev/discourse-events version and it’s broken composer image uploads capability (or I should say the newest version of Discourse has broken itself against the events plugin.) Please advise.
I am now reverting back to 2.9.0.beta8 vs 2.9.0.beta9, tested on other environments, 2.9.0.beta8 and events plugin together allow image uploads through the Composer WYSIWYG again.