I had exactly the same issue yesterday.
It took me several hours to finally be able to build 2.83 branch. What worked for me was cleaning up SVN repo of the libraries several times.
I know it sounds strange, but every time error popped up, I closed make terminal, went to the lib\win64_vc15 directory, initiated Cleanup command from Tortoise SVN. and ran make again. It took like 5 repetitions, but then finally make succeeded.
That being said, there must be something wrong with the SVN repo here. It’s especially frustrating for first timers trying to build Blender, as you will encounter multiple failures along the way despite following the guide exactly.