We are unable to upload this Certificate file because it is invalid. Please check the file and try again [closed]

Question

I've already checked every single post in this forum, but nothing seems useful.
I've generated my development certificate on apple site without any problem, but now I'm not able to generate the distribution one.

I'm not new to these things, but this is the first time that a thing like this happens to me. I've tried to change browser and use safari, but it doesn't work.

Any advice?

Answer 1

I just had this problem. I'd left the Common Name: field blank. I filled it in and the error went away.