Thanks for the tip! I set httpErrors errorMode="Off" in my web.config but the response is still a generic 404 server error.



Any other ideas? Thanks again!

I believe you need to completely remove that section from your web.config. Simply setting to Off is not enough. Give it a try!

Sorry, same result if I completely remove that line, just 404 response and The requested resource does not support http method 'GET'. if I try to hit the url directly in the browser.

I was going to go ahead and attempt to install a vanilla DNN 10.1 install with revindex and compare the web.configs for any differences, its a pretty old site originally so I'm wondering if a bin dll is off somewhere...

Did you try to remove the WebDAV completely from your IIS? WebDAV is usually present in very old installations of Windows Server/IIS that have been upgraded over the years.

I did, that's exactly what solved the cart updates issue, but this one still persists.