R 中 quantmod 的 getSymbols() 不起作用

我尝试getSymbols()从quantmodR 中著名的库运行，但没有奏效。所以想请教一下这个问题怎么解决。

我尝试的代码如下：

library(quantmod)

getSymbols("AAPL")

Error in download.file(paste(yahoo.URL, "s=", Symbols.name, "&a=", from.m,  : 
  cannot open URL 'http://ichart.finance.yahoo.com/table.csv?s=AAPL&a=0&b=01&c=2007&d=4&e=30&f=2019&g=d&q=q&y=0&z=AAPL&x=.csv'
In addition: Warning message:
In download.file(paste(yahoo.URL, "s=", Symbols.name, "&a=", from.m,  :
  InternetOpenUrl failed: '서버 이름이나 주소를 확인할 수 없습니다.'

getSymbols("AAPL", src="google")

Error in download.file(paste(google.URL, "q=", Symbols.name, "&startdate=",  : 
  cannot open URL 'http://finance.google.com/finance/historical?q=AAPL&startdate=Jan+01,+2007&enddate=May+30,+2019&output=csv'
In addition: Warning message:
In download.file(paste(google.URL, "q=", Symbols.name, "&startdate=",  :
  cannot open URL 'http://finance.google.com/finance/historical?q=AAPL&startdate=Jan+01,+2007&enddate=May+30,+2019&output=csv': HTTP status was '403 Forbidden'

我曾经在同一个桌面（操作系统：Windows 8.1K、x64）上运行过这个功能。

感谢您告诉我正确的最新版本，所以我尝试升级如下所示的软件包，但失败了。

install.packages("quantmod")

它回答说它仍然调用 v0.4-7。

Installing package into ‘C:/Users/fya/Documents/R/win-library/3.3’
(as ‘lib’ is unspecified)
trying URL 'https://mran.revolutionanalytics.com/snapshot/2016-11-01/bin/windows/contrib/3.3/quantmod_0.4-7.zip'
Content type 'application/zip' length 472947 bytes (461 KB)
downloaded 461 KB

package ‘quantmod’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
    C:\Users\***\AppData\Local\Temp\RtmpozsYvx\downloaded_packages

有没有更有效的方法来解决这个问题？

我参考了另一个关于在 R 中升级包的 stackoverflow 页面： https://stackoverflow.com/questions/21461649/how-to-update-a-package-in-r