@FionaCherry I would need to see your log to understand. I have seen errors from upgraded 19.1 projects before. I suspect this has something to do with a bad state of that component in your 19.1 project. You might want to delete it and re-upgrade that project. If you've already made changes, you can do the upgrade and simply copy out this particular automation and overwrite your upgraded project with it. You can probably also remove that component from the automation via the XML and then re-add it once you're able to get it opened again.