jupyterlab 扩展安装时出错："@kiteco/jupyterlab-kite" is not a valid npm package？

jupyterlab 扩展安装时出错：安装 @kiteco/jupyterlab-kite 时发生错误。"@kiteco/jupyterlab-kite" is not a valid npm package？
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命令行安装也提示错误
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