When your errors occur in your Zaps, your Task History. When you look closer you can see that there are field names inside curly brackets (
This happens because no value has been sent through on that particular field at the time the Zap ran. As this field is required data to be entered in order to carry out your Action, what you will need to do is create two Zaps, one for when that value exists and one for when it’s empty so that you add a fixed value in order to carry out your Action. This will then prevent further errors appearing in your Task History.