Issues with Lindy's Slack Message Actions and Thread Replies

Hey guys, I’m trying to get my Lindy to reply to a slack message in the thread, but this “Send Message” action doesn’t seem available anymore. when i copy and paste it from prior trees, it shows “3 things” missing that i can’t fix. Same goes for Observe Messages. without Observe, Lindy keeps replying to people in the slack thread even if it’s not getting mentioned (which the trigger above filters on correctly). cc Marvin A.