You access BTCPay Server over an unsecured network.

I’m getting the following message when I access btcpay frontend on https://btcpay.freedomnode.com:

You access BTCPay Server over an unsecured network. If you are using docker deployment with NGINX and HTTPS is not available, you probably did not configured your DNS settings right. 
We disabled the register and login link so you don't leak your credentials.

As you can tell the website has a valid certificate.

My settings.config:

network=mainnet
chains=btc
port=23001

BTC.explorer.url=http://127.0.0.1:24445
BTC.lightning=type=lnd-rest;server=https://127.0.0.1:8888/;macaroonfilepath=/home/satoshi/.lnd/data/chain/bitcoin/mainnet/admin.macaroon;certthumbprint=<fingerprint>

postgres=User ID=<user>;Password=<pas>;Host=localhost;Port=5432;Database=<db name>;

I installed btcpay manually using this guide

So I’m running with Apache and reverse proxy.

Everything worked fine until I pulled from master just now (I usually update once a month).

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic

[NicolasDorier]

Basically your Apache need to forward the Host and the protocol of the client down to btcpay server.

[NicolasDorier]

Cool!