Trouble Using Dust's New Slack Feature for Thread Files

Hi There! Thank you for dust, it's awesome (and I love that it's french 🇲🇫 🍾 ;-) We are trying to use this new feature https://docs.dust.tt/changelog/slack-bot-now-includes-thread-files-in-conversations but I can't get dust to see files we share in slack threads... I tried removing and adding the dust app on slack but so far ... no success 😓