Error while using ntlmAuth

Hello,
I am trying to use ntlmAuth in my scala file. It was working fine and looked good. The other day, I tried running script and received compile error: value ntlmAuth is not a member of io.gatling.http.request.builder.HttpRequestBuilder

Seems that from documentation, it is pretty easy. Here is my line:

.exec(http(“request_0”)
.get("/projects?includeDetails=true")
.ntlmAuth(admin,pwd,dmn,xd)
.headers(headers_0))

Any thoughts on why this is happening?

Thanks.