How to install vtkplotter with Python 3.8.5?
It appears that vtkplotter has migrated to vedo (Link to GitHub repo with installation instructions). Maybe you are better off using vedo for newer Python versions.
you can install it by conda
To install this package with conda run one of the following:
conda install -c conda-forge vtkplotter
conda install -c conda-forge/label/cf202003 vtkplotter