Create An Event not working

I'm trying to submit a viewing party I'm preparing for MSI finals :) When I click on any "Organise A" button on the 'events/new' page it won't let me create any events. I've tried on multiple computers and via mobile, I can't make them. My mates can though. Also whenever I load the page I get a "An Unknown Error Has Occurred" red dialogue box at the bottom of the screen (picture here for clarification) if that helps diagnose. Plz halp, mod mates! <3
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