Some tiny-cuda-nn dependencies are missing

[jasonhu4]

I ran the command cmake . -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo and got the following error:
CMake Error at CMakeLists.txt:49 (message):
Some tiny-cuda-nn dependencies are missing. If you forgot the
"--recursive" flag when cloning this project, this can be fixed by calling
"git submodule update --init --recursive".

However, when I used the git submodule update command, it did not seem like anything happened. When I reran the cmake command, I got the same error. Does anyone know how to fix this? Thanks!