I’m suspecting that the recent update to the plugin versions may be causing the issue. I conducted a test by submitting the form without selecting a date, and it passed— the form was submitted, and an email was successfully sent, as shown here: View Screenshot.
I attempted to upgrade/downgrade the Contact Form 7 Datepicker, but it’s no longer available for download due to a security issue starting April 1, 2024.
Therefore, I plan to switch to a different date input method or another datepicker plugin and will provide an update shortly.
