That's a certificate problem, there is no key in the certificate! ! Offline signature is very troublesome. I only sign online.

I use Eurocool's online signature channel to do the certificate twice a day, which is much faster than Saipan's forum, and I don't have to rush to grab those places. After the certificate is completed, I can upload the software that I can't install directly, sign it online, and it can be completed in a few seconds, and then download and install it on my mobile phone. How fast and convenient ~! Sign online, you can sign anywhere, as long as you have a computer and a network, you don't have to worry about the key at all.