我正在尝试安装spacy，并在jupyter笔记本电脑中使用它。按照spacy.io上的说明，我执行以下步骤安装软件包：
conda install -c conda-forge spacy
安装spacy时，出现不兼容错误： 问题是什么，我该如何解决？
错误是：
UnsatisfiableError: The following specifications were found to be incompatible with each other:
Package jsonschema conflicts for:
spyder -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
nbformat -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
anaconda==2019.07=py37_0 -> anaconda-project==0.8.3=py_0 -> anaconda-client -> nbformat[version='>=4.4.0'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
notebook -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
anaconda-client -> nbformat[version='>=4.4.0'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
ipywidgets -> widgetsnbextension[version='>=2.0.0,<3.0.0,>=3.0.0,>=3.0.0,<3.1.0,>=3.0.0,<4.0.0,>=3.1.0,<4.0,>=3.4.0,<3.5.0'] -> notebook[version='>=4.2.0,>=4.4.1'] -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
jupyterlab -> jupyterlab_launcher[version='>=0.2.3,>=0.5.4,<0.6.0,>=0.6.0,<0.7.0'] -> notebook -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
jupyter -> ipywidgets -> widgetsnbextension[version='>=2.0.0,<3.0.0,>=3.0.0,>=3.0.0,<3.1.0,>=3.0.0,<4.0.0,>=3.1.0,<4.0,>=3.4.0,<3.5.0'] -> notebook[version='>=4.2.0,>=4.4.1'] -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
widgetsnbextension -> notebook[version='>=4.2.0,>=4.4.1'] -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
anaconda-project -> anaconda-client -> nbformat[version='>=4.4.0'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
jupyterlab_server -> notebook[version='>=4.2.0'] -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
_ipyw_jlab_nb_ext_conf -> jupyterlab -> jupyterlab_launcher[version='>=0.2.3,>=0.5.4,<0.6.0,>=0.6.0,<0.7.0'] -> notebook -> nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
jsonschema
anaconda-navigator -> anaconda-project[version='>=0.4'] -> anaconda-client -> nbformat[version='>=4.4.0'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
nbconvert -> nbformat[version='>=4.4'] -> jsonschema[version='>=2.0,!=2.5.0,>=2.4,!=2.5.0']
问题是什么，我该如何解决？