Error in curl::curl_download(cu, tmp, handle = h) : error setting certificate verify locations:

Hello,
I was following the setup instructions on Digital Ocean and working through their example until got to this error:

getSymbols('AAPL', data)
Error in curl::curl_download(cu, tmp, handle = h) :
error setting certificate verify locations:
CAfile: microsoft-r-cacert.pem
CApath: none

I've looked around and saw that some people have problems with a proxy but that isn't the problem here.
This is my first time posting here so I'm not sure the best way to provide version info, etc., so this is a paste of sessionInfo(): Ubuntu Pastebin