No manifest.json was found at the root of the extension. The package file must be a ZIP of the extension's files themselves, not of the containing directory. See: https://mzl.la/2r2McKv for more on packaging.
在扩展的根目录下未找到 manifest.json。软件包文件必须是扩展文件本身的 ZIP，而不是包含其目录的 ZIP。有关软件包的更多信息，请参阅：https://mzl.la/2r2McKv。