Collecting package metadata (current_repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Collecting package metadata (repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. PackagesNotFoundError: The following packages are missing from the target environment: - joblib==1.1.0=pyhd8ed1ab_0 - networkx==2.7.1=pyhd8ed1ab_0 - typing_extensions==4.1.1=pyha770c72_0 - matplotlib-base==3.5.1=py38hf4fb855_0

这个错误表明您尝试安装的环境中缺少一些包或版本不匹配。您可以尝试使用以下命令更新您的conda环境：

conda update --all

如果仍然出现问题，请尝试使用以下命令安装缺少的包：

conda install joblib=1.1.0 networkx=2.7.1 typing_extensions=4.1.1 matplotlib-base=3.5.1

如果您使用的是虚拟环境，请先激活该环境再执行上述命令。