I tested your form, starting with seeing how your form responds to trying to send with required fields not completed.
I immediately see the continuously spinning arrow which is a common sign of a conflict with your WP theme or one of the other plugins you are using.
I’m also seeing the following console area:
VM8:1 POST http://www.pulsetech.org/wp-json/contact-form-7/v1/contact-forms/336/feedback 401 (Unauthorized)
I suspect this is may be a cause of your problems.
Switch temporarily (nothing will be lost when you switch back) to a WP default theme & disable all plugins other than Contact Form 7 to see if the problem goes away.
If it does you can switch back to your theme & re-activate each plugin one by one to see when the problem occurs.
Neil,
Thanks so much for taking a look at the form!
Your suggestion certainly made sense, and I tried it by disabling all plugins except Contact Form and set the theme to Twenty Nineteen, a default theme.
The same error result happened.
I did also check to assure reCaptcha 3 was installed correctly and it was, and logo shows on all pages.
Do you think there’s anything else that could be tried?
Update:
Even though I show the reCaptcha logo on all pages and it showed as active in the contact integration screen, I removed reCaptcha and the email send worked.
Then, I went to the reCaptcha website and regenerated new site and secret keys and reactivated the option, and the email now works properly.
Neil: Thank you again for your time to look at my form and the assistance!