Applied the Easy Fix on Windows 7 Ultimate laptop.
Now able to login via built-in form and secure browser.
However it did not work on my MFPro dedicated laptop running Windows XP Professional
(Not Windows 7 Home as previously stated).
It says the Easy Fix is not applicable to my operating system.
Downloaded and ran MFPro 8.7.3.3.
Still {error: Unable to send request, 33, code: The operation has been cancelled}
Hmmm...perhaps it's because it's an "old" operating system.
Googling led to https://www.smartftp.com/en-us/support/kb/2754
Followed the instructions but still not able to login. Same error.