Hi everyone,
Today my stable mailman3 server started having web access problems. It specifically applies to only one of three lists on the mailman server (one of the others use the same domain name) and only to the held_messages page as admin. It displays the "Mailman REST API not available..." message despite the other two lists displaying it fine. I've rebooted the server and mailman core, but the problem remains (which is what I've seen suggested on this forum for the same error message so far).
I've been running a stable mailman3 server for the last 9 months and only updating the security patches for the the underling OS (Debian 10 with postgresql and nginx), I've encountered a problem that just seemed to appear today (wish no recent changes on the server).
Any suggestions or diagnosis to resolve it?
Duane