Invalid MailChimp API key Free and Premium WordPress Plugins & Themes Forums WordPress Plugins Another MailChimp Widget Invalid MailChimp API key Tagged: api key, header, mailchimp, may 15, update key, update mailchimp This topic contains 4 replies, has 2 voices, and was last updated by J. Davis 5 days, 8 hours ago. Viewing 5 posts - 1 through 5 (of 5 total) Author Posts May 15, 2019 at 1:28 am #804728 VenskayaParticipant I have been using this plugin since 2017. Within two weeks, I see a message “Invalid MailChimp API key” (version 2.0.7 and 2.0.8) May 17, 2019 at 2:16 pm #805856 J. DavisKeymaster Hi, Could you try to update API key to sync plugin with your mailchimp account following this article best regards, J. Davis May 17, 2019 at 10:50 pm #805996 VenskayaParticipant I generated new keys on May 14 and 18, 2019 May 18, 2019 at 11:30 pm #806218 VenskayaParticipant I added MailChimp code for connected website to header. Now plugin works perfectly. May 21, 2019 at 9:20 pm #807274 J. DavisKeymaster Hi, Thank you for your reply and shared article. Locally it worked without adding code to header of the theme. Anyway we appreciate your feedback and collaboration. Thanks best regards, J.Davis Author Posts Viewing 5 posts - 1 through 5 (of 5 total) You must be logged in to reply to this topic.