Hi @ufo56
I hope you’re well today!
This “error” is a notice only and while it should not be there (I’ve already reported it to our developers), it also shouldn’t cause the issue, especially that in the code it’s related to checking if “member” (as in subscription) was deleted from MailChimp.
Such a subscription issues are usually related to field names of the form in Hustle. The field name consistency of elements is important for Hustle and 3rd party integrations to communicate data correctly. Fields’ names in Hustle must match field tags in Mailchimp, otherwise integration will fail and e-mail won’t be subscribed to MailChimp list.
Could you double-check that, please?
If you confirm that this isn’t the case or it doesn’t help, please go to “Hustle -> Settings -> General” page and enable Hustle debug log there. I’m understand that you already have WP debug.log enabled so enabling Hustle debugging should make Hustle write additional information into it.
Once that’s done, please test subscription again and let me know if there are any additional errors showing up there.
Kind regards,
Adam
