I cannot generate an invoice because it keeps saying Please Specify an email address to send to

AI generated answer (using internal Slack threads):

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** The error message "Please specify an email address to send to" during invoice creation is likely due to the fact that the system is trying to send an email but cannot find a valid email address. This could be driven by the customer record. Even though the "To be emailed" checkbox is hidden in the invoice form, the email checkbox is checked in the customer record under the "send transactions via" field. If the sender needs to be an entity and you're trying to add an email address field to the invoice, it's important to note that this field is only available as a recipient, not a sender. The sender must be an employee. Some users have created dummy employee records for this purpose, such as "Accounts Payable" and "Accounts Receivable" to be able to use in workflow emails. Additionally, if the user is being navigated to the transaction main page instead of showing an email pop-up window when clicking on Invoice -> Email, this could be due to a user preference setting. Please check these settings and adjust as necessary.