sdl2 - ImportError: DLL load failed: The specified module could not be found and [CRITICAL] [App] Unable to get a Window, abort

I had the same problem. I solved this by removing Kivy and its dependencies first.

python -m pip uninstall kivy

python -m pip uninstall kivy.deps.sdl2

python -m pip uninstall kivy.deps.glew

python -m pip uninstall kivy.deps.gstreamer

python -m pip uninstall image

Now reinstalling everything except gstreamer.

python -m pip install --upgrade pip wheel setuptools

python -m pip install docutils pygments pypiwin32 kivy.deps.sdl2 kivy.deps.glew --extra-index-url https://kivy.org/downloads/packages/simple/

python -m pip install kivy

It solved the error. Credits to Ben R's Answer.