ValueError: Model not implemented! (Musicnn_big)

[JLenzy]

I'm able to pip install and run the standard musicnn without issue, but when attempting to build and then run the mtt_musicnn_big it gives me the following error:

ValueError: Model not implemented!

I'm running this inside a venv with python 3.8. Any advice on how to fix this? I am following the build instructions from the readme. In case this is helpful, it spits out a number of warnings at the end of the build process:

### Warning:  Using unoptimized lapack ###
### Warning:  Using unoptimized lapack ###
no previously-included directories found matching 'doc/build'
no previously-included directories found matching 'doc/source/generated'
no previously-included directories found matching 'benchmarks/env'
no previously-included directories found matching 'benchmarks/results'
no previously-included directories found matching 'benchmarks/html'
no previously-included directories found matching 'benchmarks/numpy'
warning: no previously-included files matching '*.pyo' found anywhere in distribution
warning: no previously-included files matching '*.pyd' found anywhere in distribution
warning: no previously-included files matching '*.swp' found anywhere in distribution
warning: no previously-included files matching '*.bak' found anywhere in distribution
warning: no previously-included files matching '*~' found anywhere in distribution