Hey! Yeah that happens because it's a homemade script and it's mentioned in the "Instructions" sheet. But in case it wasn't clear, when the pop up happens, click on the Advanced link and then click on Go to CR Chart Automation (Unsafe). For reassurance, the script is safe as it does not pull any data outside of what you put in your spreadsheet and it doesn't go anywhere. It remains local to the sheet. After that, click on the Allow button and you'll be good to go!