SSLError: [Errno 2] No such file or directory

[speedplane]

I've started getting the following Traceback when sending to Postmark:

Traceback (most recent call last):
  File "../updater\CrossPlatform.py", line 1494, in _send_email_postmark
    resp = pystmark.send(message, api_key = passwords.postmark_apikey)
  File "..\libs\pystmark.py", line 96, in send
    secure=secure, test=test, **request_args)
  File "..\libs\pystmark.py", line 1007, in send
    return self._request(url, data=data, headers=headers, **request_args)
  File "..\libs\pystmark.py", line 891, in _request
    response = requests.request(self.method, url, **kwargs)
  File "..\libs\requests\api.py", line 44, in request
    return session.request(method=method, url=url, **kwargs)
  File "..\libs\requests\sessions.py", line 456, in request
    resp = self.send(prep, **send_kwargs)
  File "..\libs\requests\sessions.py", line 559, in send
    r = adapter.send(request, **kwargs)
  File "..\libs\requests\adapters.py", line 382, in send
    raise SSLError(e, request=request)
SSLError: [Errno 2] No such file or directory

The URL this call is sending to is: https://api.postmarkapp.com/email

The keyword arguments are:

{'data': '{"From": "[email protected]", 
           "To": "mes65@<REDACTED>", 
           "Cc": "michael.sander@<REDACTED>", 
           "HtmlBody": "<p>html_content: test email: function _send_email_postmark at 0x0000000005E8F438.</p>", 
           "Headers": [{"Name": "X-Docket-Alarm", "Value": "Test Email"}], 
           "TrackOpens": true, "Tag": "testing", 
           "TextBody": "text_content: test email: function _send_email_postmark at 0x0000000005E8F438.",
           "Subject": "DA Email Test"}',
 'headers': {'Accept': 'application/json',
             'Content-Type': 'application/json',
           'X-Postmark-Server-Token': '<REDACTED>'}}

I monkey-patched pystmark.py on line 891 adding verify=False to the call to the requests library. That turns off SSL authentication checking, and appears to fix the issue. But ideally, I'd like to be able to use SSL.