This is the exact problem with these kind of forums. Either no one ever finds the reason for the error they are having or don’t post the solution they found. I posted a similar issue today after doing over 20 hours of research and troubleshooting and two people replied. The first one told me to use a program other than K40 Whisperer and the second told me to use Ubuntu with no direction on how to use it. Conclusion: forums like this are utterly useless.