Cannot use encryption: Error handling request

I’m trying to use encryption so I can use IFTTT, I’m used Let’s Encrypt with DuckDNS, I have my cert and key and pointed the configuration to their location. If I try to access the front end via https I get an ERR_SSL_PROTOCOL_ERROR in Chrome and this error in the log:

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/site-packages/aiohttp/web_protocol.py", line 242, in data_received
    messages, upgraded, tail = self._request_parser.feed_data(data)
  File "aiohttp\_http_parser.pyx", line 523, in aiohttp._http_parser.HttpParser.feed_data
aiohttp.http_exceptions.BadStatusLine: invalid HTTP method

I’m running HA in a FreeNAS (FreeNAS-9.10.2-U1) jail