Starting a few weeks ago, the installation of Backdrop I have on multiple different machines (all running MacOS Server) has stopped being able to retrieve updates.
The log error I get is:
HTTP request to https://updates.backdropcms.org/release-history/backup_migrate/1.x?site_... failed with error: Error opening socket ssl://updates.backdropcms.org:443.
Navigating to the selected URL shows me a 404 error from NGINX.
Searching for this on the forum shows up errors relating to expired/invalid certificates in MAMP, or errors opening SSL connections in PHP 5.6. In this case, though, I'm not using MAMP, and I'm on PHP 7.1.33.
I manually updated to 1.20.2 and the problem persists.
Anyone have any ideas?