R is giving me an SSL error that says Error in curl::curl_fetch_memory(url, handle = handle). What should I do?

This error almost always indicates an issue with your firewall.

In the past, using code similar to this has fixed the issue:

library(httr)
set_config(
use_proxy(url="18.91.12.23", port=8080, username="user",password="password")
)	

Of course, you would need to modify this to use your specific network information, which you can get from IT support on your side.