22 Jun
2020
22 Jun
'20
7:08 p.m.
I ran into this same error over the weekend and posted this fix - hopefully it will help you! https://lists.mailman3.org/archives/list/mailman-users@mailman3.org/message/...
Be sure also that you've addressed the other possiblitites: matching api_key/ARCHIVER_KEY, the base URL and ARCHIVER_FROM, and allowed hosts. But for me all those things were fine, but I think because I used certbot to install SSL certificates after I had already set up the mailman3 server, and I accepted the certbot "redirect everything" option, localhost conversations with hyperkitty were getting blocked. Good luck.