iOS Question B4i - Private Sign Key


Licensed User
Longtime User
Good afternoon, I contact to make an inquiry.
I have installed B4i on a Windows 10 computer and I have an iPhone 6 (intended for development) and Apple Developer credentials. I have already configured the paths and the build server. The latter is found as below:


However, when I try to generate the private signature key I get the following error message:


This causes the files corresponding to the keys not being generated correctly, specifically the CSR that I need to associate in Apple Developer.
If someone could guide me it would be a great help. It should be noted that I AM FOLLOWING THE STEPS FOUND IN THE TWO TUTORIALS OF THE FORUM.
Thank you in advance.
Best regards.