title: Flask-ask AttributeError: module 'lib' has no attribute 'X509V3_EXT_get'
body: <p>I'm using flask-ask in virtual environment with Ngrok. I keep getting 500 Internal server errors</p>
  
  <p>I get the following error:</p>
  
  <pre><code> File "C:\Users\laptop\Envs\alexa\lib\site-packages\OpenSSL\crypto.py", line 740, in _subjectAltNameString
      method = _lib.X509V3_EXT_get(self._extension)
  AttributeError: module 'lib' has no attribute 'X509V3_EXT_get' 
  </code></pre>
  
  <p>I've tried downgrading to older versions of cryptography but they won't install. I get this error.   </p>
  
  <pre><code>  _openssl.c
      build\temp.win32-3.7\Release\_openssl.c(501): fatal error C1083: Cannot open include file: 'openssl/aes.h': No such file or directory
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\VC\\Tools\\MSVC\\14.15.26726\\bin\\HostX86\\x86\\cl.exe' failed with exit status 2
  </code></pre>
  
  <p>I've installed visual studio with C++ thinking it was something to do with  compiling but that hasn't worked either.</p>
  
  <p>I've also updated setuptools, install OpenSSL and nothing seems to work. My theory is that Flask-Ask is no longer compatible with the version of cryptography, but older versions of cryptography are no long installable because of compiling issues.</p>