ID 427420 - libeay32.dll and ssleay32.dll are missing, which can cause PySide2 networking errors

Problem summary
libeay32.dll and ssleay32.dll are missing, which can cause PySide2 networking errors

In this case using QtNetwork.QNetworkAccessManager() with a https website returns no data with error: PySide2.QtNetwork.QNetworkReply.NetworkError.UnknownNetworkError

This only affects Windows, as the error does not occur on Linux or Mac

Customer reported version
nuke.11.3v1

Customer reported platform
windows10

Steps to reproduce

1) Open Nuke

2) Open the Script Editor, and run the below code:

from PySide2 import QtCore, QtWidgets, QtGui, QtNetwork
nam = QtNetwork.QNetworkAccessManager()
url = 'https://www.foundry.com'
request = QtNetwork.QNetworkRequest( url )
reply = nam.get( request )
def answer():
    c = reply.readAll()
    print ("Len: %d" % len(c))
    print ("Data:"+str(c[:4]))
    print ("Error: "+ str(reply.error()))
    print (reply.errorString())
reply.finished.connect(answer)

*You can also check the Nuke install for libeay32.dll and ssleay32.dll files

Expected behaviour
For Nuke to return and for the files to be in Nuke's install directory:

Len: 21963
Data:<!DO
Error: PySide2.QtNetwork.QNetworkReply.NetworkError.NoError
Unknown error

Actual behaviour
The files are not there and Nuke returns:

Len: 0
Data:
Error: PySide2.QtNetwork.QNetworkReply.NetworkError.UnknownNetworkError
TLS initialization failed

Workaround
Add a location to your PATH environment variable that contains libeay32.dll and ssleay32.dll files

Reproduced by support
This bug has been reproduced in:

Nuke 12.1v1 - Windows 10

Nuke 12.0v1 - Windows 10 - regression

Unable to reproduce bug in:
Nuke 12.1v1 - macOS 10.13 - CentOS 7.7

Nuke 11.3v6 - Windows 10

Earliest version tested
Nuke 11.3v6 - This issue doesn't appear in this version and has regressed