Hey @Simmo86
You're very welcome... Almost there!!! 😀
The error indicates that the "To" field is empty, so please double check if the CSV has all email columns filled in. I suspect that you have 1 column without email and since you pass the value from the CSV and it's empty, it fails.
The error message doesn't help, but the log that you provided was great, thanks for adding it.
Can you please check and get back to me?
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Cheers
Manuel