Hello
Yes, the build log is saved in a file called "build.log" in the Xcode project directory. Post it on https://www.pmbaty.com/paste and put the link here.
But at first sight, I can spot something incorrect. When you installed it, the builder advised you to put your Xcode projects in C:\iOS in opposition to anywhere else, to work around a path length limitation issue (260 characters max) on Windows. You might have skipped that informative dialog box. I suggest doing that first. I don't know if it'll solve exactly this problem, but it'll certainly avoid others.