How to solve the following error?

varadi · 2019-07-15T07:26:16+00:00

I am using R script to fetch data from the online source: I am getting the following error: "schannel: next InitializeSecurityContext failed: SEC_E_UNTRUSTED_ROOT (0x80090325) - The certificate chain was issued by an authority that is not trusted." is there any solution? thanks, vijay