Neo4j Connection with R Failed (Using RNeo4j)

I tried to connect R with Neo4j database using startGraph fucntion in RNeo4j package.

It works if I am connecting R with my local Neo4j database. However, it failed once I tried to connect R with my school's Neo4j database.

Here is the code used to connect R with my local Neo4j (Username and password were hided due to confidential reason).

library(RNeo4j)
graph = startGraph("http://localhost:7474/db/data/", username = "xxx", password = "xxx")

By connecting R to my school's Neo4j database, I just changed the http address from above code. Here is the error message.

Error in curl::curl_fetch_memory(url, handle = handle) : 

    schannel: next InitializeSecurityContext failed: SEC_E_UNTRUSTED_ROOT (0x80090325) - The certificate chain was issued by an authority that is not trusted.

Thanks in advance.