downloadTask = uni.downloadFile({
        url: `${downurl.value}&forced=1`,
        // filePath: downflpth,
        timeout: 1000 * 60 * 60 * 60 * 24,
        success: (res) => {
            console.log('downloadTask.success:', res)
            }, fail: err => {
            console.log('downloadTask.fail:', err)
            }



有些文件正常下载。

某些文件报错：msg:downloadFile:fail The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received null

看着是参数错误？可是文档的例子不也这么写的吗