Remote Authorization loop with S2Pro

Last night I moved from DreamPress (with Varnish) to DreamPress Cloud (with NGINX), and suddenly my podcast membership feed has stopped working. I’m in what looks like a remote authorization loop.

Previously, I got around the Remote Auth errors with this entry in my .htaccess

# Pass Authorization headers to an environment variable RewriteEngine On RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

But now that I’m on this new server.

I have uninstalled and reinstalled the plugin, had them switch me to Varnish, cleared all caches, and tried a variety of different devices and the remote auth loop continues.

The Dreampress Devs seem a little baffled, and I am too. Does anyone have any ideas?