极光IM自动集成异常 Could not determine artifacts for cn.jiguang.sdk:jmessage:2.7.0
自动集成极光IM时：
Could not resolve all dependencies for configuration ':app:debugRuntimeClasspath'.
Could not determine artifacts for cn.jiguang.sdk:jmessage:2.7.0
Could not get resource 'https://jcenter.bintray.com/cn/jiguang/sdk/jmessage/2.7.0/jmessage-2.7.0.aar'.
Could not HEAD 'https://jcenter.bintray.com/cn/jiguang/sdk/jmessage/2.7.0/jmessage-2.7.0.aar'.
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请问这是怎么回事 尝试了很多方法，是需要翻墙吗？