Conda无法在新安装上解决环境问题

Question

在新安装的Python上，我遇到了一个与Conda有关的奇怪问题。我最近安装了Miniconda3，并使用它创建了一个新环境。然后，当我试图在上述新环境中安装Spyder时，出现了以下消息：

Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: done

这是Miniconda3的全新安装，所以我不明白为什么会出现这样的错误

为了创建新环境并安装Spyder，我运行了以下命令：

>>> conda create -n new-env [answered y when prompted]
>>> conda install -n new-env spyder

我当前的base环境包含以下包：

# packages in environment at C:\Miniconda3:
#
# Name                    Version                   Build  Channel
brotlipy                  0.7.0           py38h2bbff1b_1003
ca-certificates           2020.10.14                    0
certifi                   2020.6.20          pyhd3eb1b0_3
cffi                      1.14.3           py38hcd4344a_2
chardet                   3.0.4           py38haa95532_1003
conda                     4.9.2            py38haa95532_0
conda-package-handling    1.7.2            py38h76e460a_0
console_shortcut          0.1.1                         4
cryptography              3.2.1            py38hcd4344a_1
idna                      2.10                       py_0
menuinst                  1.4.16           py38he774522_1
openssl                   1.1.1h               he774522_0
pip                       20.2.4           py38haa95532_0
powershell_shortcut       0.0.1                         3
pycosat                   0.6.3            py38h2bbff1b_0
pycparser                 2.20                       py_2
pyopenssl                 19.1.0             pyhd3eb1b0_1
pysocks                   1.7.1            py38haa95532_0
python                    3.8.5                h5fd99cc_1
pywin32                   227              py38he774522_1
requests                  2.24.0                     py_0
ruamel_yaml               0.15.87          py38he774522_1
setuptools                50.3.1           py38haa95532_1
six                       1.15.0           py38haa95532_0
sqlite                    3.33.0               h2a8f88b_0
tqdm                      4.51.0             pyhd3eb1b0_0
urllib3                   1.25.11                    py_0
vc                        14.1                 h0510ff6_4
vs2015_runtime            14.16.27012          hf0eaf9b_3
wheel                     0.35.1             pyhd3eb1b0_0
win_inet_pton             1.1.0            py38haa95532_0
wincertstore              0.2                      py38_0
yaml                      0.2.5                he774522_0
zlib                      1.2.11               h62dcd97_4