Error Message: Houston, we have a problem. Invoice Draft can't be sent to Xero because of the following errors: Email address must be valid.
The same error may occur for Purchases/Bills as well.
- Go to Customers (or suppliers for Bills/Purchases)
- Find the customer (or supplier) associated with the Invoice (or Purchase/Bill)
- Check the email address is in the correct format. Check for typos or other incorrect characters/formatting for an email address.