我正在遵循此tutorial在Mac上安装openCV。 我在“步骤4b：通过Conda（Custom）安装OpenCV（2/3）”这一点上。 我想用以下命令安装Matplotlib：
conda install -c conda- forge matplotlib
但是我得到这个错误：
Solving environment: failed
CondaHTTPError: HTTP 404 NOT FOUND for url <https://conda.anaconda.org/conda-/noarch/repodata.json>
Elapsed: 00:00.461192
CF-RAY: 4a0c52fec9b0c4c9-DUS
The remote server could not find the noarch directory for the
requested channel with url: https://conda.anaconda.org/conda-
As of conda 4.3, a valid channel must contain a `noarch/repodata.json` and
associated `noarch/repodata.json.bz2` file, even if `noarch/repodata.json` is
empty. please request that the channel administrator create
`noarch/repodata.json` and associated `noarch/repodata.json.bz2` files.
$ mkdir noarch
$ echo '{}' > noarch/repodata.json
$ bzip2 -k noarch/repodata.json
You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state.
Further configuration help can be found at <https://conda.io/docs/config.html>.
我用Google搜索并查找了堆栈溢出，但没有任何帮助。 有人知道该怎么办，我该如何解决？ 我已经激活了新环境
source activate ComputerVision
感谢您的帮助。