Got SSL_ERROR_UNSUPPORTED_SIGNATURE_ALGORITHM when I went to the site and a redirect to https when I manually changed the protocol to http. I turned off https-only mode in Firefox so it appears to be a redirect that your server is sending back.

When I change the protocol and get the redirect back to https there's another "/" which is added after the domain such that "domain/path" becomes "domain//path". This repeats if I continue to change the protocol and hit the redirect such that "domain//path" will become "domain///path" (I noticed this because there was like 6 of them).

Apologies if this is indeed caused by my browser settings; I've been unable to find the cause if that's the case.