I finally realized what the issue was, I think..LOL The router is actually at my daughters house and it was reset after I had set it up. When she reentered the DDNS she used a couple capital letters in the name. Reset it with all lower case letters and now it works..lol Funny because it...
I have the latest Merlin Firmware version 384.13_4 on an RT-AC87U which should fix certificate error yet I'm still getting Updating error. Any assistance would be greatly appreciated.
So I installed this beta on my RT-AC87U and I can log ito the router without issue and migrate from section to section until I click on the Administration/Firmware Update tab. It again asks for admin login and password, but when I type them in it says its the wrong login password.