在编写Gatling脚本时出现“无法解析symbol core”

libraryDependencies ++= Seq(
  "io.gatling.highcharts" % "gatling-charts-highcharts" % "3.7.6" % Test,
  "io.gatling"            % "gatling-test-framework"    % "3.7.6" % Test
)

sbt clean compile

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._

class BasicSimulation extends Simulation {

  val httpProtocol = http
    .baseUrl("http://example.com") // 替换为你的目标URL
    .acceptHeader("text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
    .doNotTrackHeader("1")
    .acceptLanguageHeader("en-US,en;q=0.5")
    .acceptEncodingHeader("gzip, deflate")
    .userAgentHeader("Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0")

  val scn = scenario("BasicSimulation")
    .exec(http("request_1")
      .get("/"))
    .pause(5)

  setUp(
    scn.inject(atOnceUsers(1))
  ).protocols(httpProtocol)
}