How can I import/export settings into a file?

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嘿 @pfaffman
我完全按照说明操作了：./discourse-settings-uploader https://discourse.example.com d35989078a system site_settings.json

但我的脚本运行失败了，我不确定原因和解决方法。
每个设置都返回了 E! 404 Not Found 错误。