To replicate, find a Mailchimp email newsletter that can be viewed via the web. Here are a few examples:
Code: Select all
https://mailchi.mp/wakeuptopolitics/june-19-2020 https://us3.campaign-archive.com/?u=a23440a018c7ba0619c6f01e6&id=7010df157f https://mailchi.mp/kurzgesagt/new-kurzgesagt-video-the-size-of-life-2500354 https://mailchi.mp/bellocollective/98-pass-the-podcasts-grandma-842125
This only started happening after 20 June 2020 and I had no issues before, since I first started using Vienna (Version 3.5.5, installed 12 March 2020).Error retrieving RSS feed: Could not connect to the server.
W3C’s Feed Validation Service successfully validates Mailchimp feeds, with some recommendations. Here are the validation results of the first example newsletter.