我一直在尝试使用twitteR软件包在新PC上下载推文：
library(twitteR)
z<-searchTwitter("#gold",n=1500)
我收到以下错误消息：
SSL certificate problem, verify that the CA cert is OK.
Details:\nerror:14090086:SSL
routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed"
Error in twInterfaceObj$doAPICall(cmd, params, "GET", ...) :
Error: SSL certificate problem, verify that the CA cert is OK.
Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
你能帮我解决这个问题吗？