Fatal error after update (Windows 7 only)

You didn't update the submodules, you only fetched the main repo

git submodule update --init

I'll go ahead and say that this is the very first time that I'm doing this sort of thing.
So I have no idea on how or where I should use that command.

--------Some time later--------

I tried to use
git submodule update --init https://github.com/RPCS3/rpcs3.git
git submodule update --init --recursive https://github.com/RPCS3/rpcs3.git
git submodule update --recursive https://github.com/RPCS3/rpcs3.git

In GitHub Desktop, but I got an error saying "Not supported".
I followed this guide here: https://www.vogella.com/tutorials/GitSub...ticle.html

By the way... I got these errors in VS: qt5.cmake line 7 (QT5) and
CMakeLists.txt line 268 (SDL2) when trying to compile RPCS3.

I downloaded QT6 (latest) afterwards. But it's only the source code. Too tired to keep looking.
Anyway... It's 3:30am here, and my eyes are burning. I'll reply later.

Hopefully you'll be able to guide me in the right direction.