CMake error: "Project files may be invalid"

TIA

To start, I am an absolute novice at this, just trying to find easy instructions that work when I follow them. Just nostalgic for some WotLK and trying to get it to work on my computer.

I found this guide online, which others seem to have had success with. I installed the same versions of each program listed on a fresh Windows 10 x64 reset, and followed the instructions to the letter. https://emudevs.gg/threads/compiling-trinity-core-3-3-5a-on-windows-a-complete-tutorial.437/#post-16214

When I got to Step 3: Prepare the Source, CMake gives me a fatal error that the project files may be invalid. Is there a better git file path to type in to get all of the required files? I noticed that the link posted no longer leads anywhere, but that step did put plenty of files into the folder I created for it. Just not enough, apparently, for CMake to finish preparing the source for compiling. I’ll try to insert a screen snip, here: