Error message " The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel in http request activity

I’m trying to use Uipath in a development project. I’m trying to use Http Request from Uipath studio to make a REST call to our server. But I get error message " The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel".
same is working fine in SOAPUI.
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