uniappx里uni.openDocument不能用

error: Unresolved reference: openDocument‌
HBuilderX版本号：4.64
代码：
openDocument(urls : string) {
uni.showLoading({
title: '正在打开',
mask: true
})
uni.downloadFile({
url: urls,
success: (res) => {
uni.openDocument({
filePath: res.tempFilePath,
success: () => {
console.log('打开文档成功')
},
fail: (err) => {
console.log('打开文档失败', err)
}
} as OpenDocumentOptions)
},
fail: (err) => {
console.log('下载失败', err)
},
complete: () => {
uni.hideLoading()
}
})
},
帮帮我，很急，等着上线呢，产品就在我身后