RSelenium 错误 - httr 调用中的未定义错误

Question

我正在使用这个代码

library(wdman)
library(RSelenium)

puerto <- 4444L 
servidor <- wdman::selenium(port = puerto)
remDr <- remoteDriver(port = puerto, browserName = "firefox")
remDr$open()

但是报错；

Error in checkError(res) : 
  Undefined error in httr call. httr output: Failed to connect to localhost port 4444 after 2238 ms: Connection refused

有人可以帮助我吗？请

我删除并重新安装包

install.packages("wdman")
install.packages("RSelenium")

但问题依然存在