After installing OpenSSL I was required to create a new environment variable:
OPENSSL_CONF
C:\Program Files\OpenSSL\openssl.cnf
In powershell:
$env:OPENSSL_CONF = "${env:ProgramFiles}\OpenSSL\openssl.cnf"
This value differs from previous installation versions (as seen in a previous edit of this post). Also, don't forget to add the openssl binary folder ${env:ProgramFiles}\OpenSSL
to your Path.