Support » Plugin: MailChimp Forms by Optin Cat - Grow Your MailChimp List » Subscribe button stopped working

  • Resolved jemalone


    My subscribe button recently stopped working. Thank goodness I had people contact me directly, otherwise I wouldn’t have known. When they try to sign up they receive an error message: Failed to add user – 403. Please help! Thanks.

    The page I need help with: [log in to see the link]

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  • I checked in with my Web Host, and they confirmed that the error is on the end of the Plugin, and not with the site. Incidentally, the plugin was always a bit sketchy – sometimes it would add people to my mail chimp mailing list, but other times it wouldn’t, and I would have to add them manually. I always had to double check.

    Plugin Author fatcatapps


    Hello jemalone,

    Sorry to hear you are having issue with our plugin. This is not normal.

    Can you please double check your Email Provider integration settings, as well as your list settings?

    First please check that integration is setup still, and that you have a check mark next to authorization information in Optin Cat, and have a list selected. It may also be worth it to reset your API key, and provide Optin Cat the new key.

    If the issue persists, please check your list settings within your provider. I Inspected you site, and the network reporting tells me that we are successfully contacting your provider, but they are denying the subscriber information for some reason.

    So make sure you have not reached any size limitations with your provider, are set to accept new subscribers, and do not have any fields marked as required for this list. If anything other than name and email is marked as required it will deny the subscriber info.

    If these steps do not resolve the issue, please get back to us with some additional details and we will continue to investigate. Let us know what provider you are using, and if this issue is for all forms, or just this one.


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