Try using say google auth instead see if the same issue, see this link for some alternatives then the swtor app
Make sure you have the latest version of the security key app, if unsure delete the one you have and download again, other then that ensure the time on the device is correct.
Just to be sure with the attach steps you have seen this help guide link
Already done all of those no effect on situation.
That guide was followed.Helps like these are the first things I try.
The error stated occurred after the serial was in app. And when i put in the reply code on the key into website.
This was mentioned in original post.
Try using say google auth instead see if the same issue, see this link for some alternatives then the swtor app
My origjinal one was the google authenticator. I'll look into it
