Hi there,
If you submit the form as a logged in administrator you should see a more detailed error message. Does your form include all required fields?
Also, do you have an URL for me to take a look at?
Ok, I logged in as an administrator, but the error did not change. No additional detail.
Then I realized that I had not selected one of the mailing lists under “Lists this form subscribes to”. Sigh. My apologies.
Once I selected a list, it started working.
Thank you for your time!
Ah, of course. Would have been helpful if the plugin showed you that though, will look into it. Thanks for letting me know you figured it out!
PS. Should you have a quick minute to spare, a plugin review here on WordPress.org would make me quite happy. 🙂
@jrmihalick Thank you. It works for me.