Leap Auto Tags | All‑in‑1 Tags

Hi, im having a problem with my workflow, its the only one im running at the moment. my set up is to remove tag "movingsale" when available quantity is 0 or less than 0. I've tried to update the inventory quantity and backdating the workflow, but i don't see its doing anything. Can someone please help me to look it up ASAP. we are running a sale for in stock items only, this error is causing a lot of headache for us at the moment. Thank you in advance. Bella