Having trouble installing a third party library and I have not seen this error before using Windows 10 with Anaconda installed:
C:\\Users\\XYZ>conda env creat
try conda env create --force -f python3.6-environment-windows.yml I'm not sure exactly where to place it but I use the --force whenever I run into issues like this like conda update --force conda or conda install --force ... use it as last solution since it force conda to perform the command and you might run into some issues later on