函数中的twitteR错误（type，msg，asError = TRUE）

Question

我收到以下错误：

twitCred$handshake(cainfo = system.file("CurlSSL", "cacert.pem", package = "RCurl")):

Error in function (type, msg, asError = TRUE) :
 Could not resolve host: api.twitter.com; Host not found, try again

如何解决此问题？