在自己的AS中导入了别人的一个项目，在编译时出现了以下错误，自己尝试了很多办法都无法解决。没有勾选离线模式，电脑也没有设置代理服务器。求大能们帮帮忙，快被这个问题愁死了
Error:Execution failed for task ':CALibrary:compileRetrolambdaRelease'.
Could not resolve all dependencies for configuration ':CALibrary:retrolambdaConfig'.
Could not resolve net.orfjackal.retrolambda:retrolambda:2.0.6.
Required by:
project :CALibrary
> No cached version of net.orfjackal.retrolambda:retrolambda:2.0.6 available for offline mode.
> No cached version of net.orfjackal.retrolambda:retrolambda:2.0.6 available for offline mode.
> No cached version of net.orfjackal.retrolambda:retrolambda:2.0.6 available for offline mode.
> No cached version of net.orfjackal.retrolambda:retrolambda:2.0.6 available for offline mode.
> No cached version of net.orfjackal.retrolambda:retrolambda:2.0.6 available for offline mode.
