Could not resolve com.android.support:support-annotations:23.+.

[GSpipi]

Could not resolve all files for configuration ':offline-task:releaseCompileClasspath'.

Could not resolve com.android.support:support-annotations:23.+.
Required by:
project :offline-task > com.zhousf.lib:okhttp3:2.8.6
Could not resolve com.android.support:support-annotations:23.+.
> Failed to list versions for com.android.support:support-annotations.
> Unable to load Maven meta-data from http://nexus.nevint.com/repository/maven-releases/com/android/support/support-annotations/maven-metadata.xml.
> Could not get resource 'http://nexus.nevint.com/repository/maven-releases/com/android/support/support-annotations/maven-metadata.xml'.
> Could not GET 'http://nexus.nevint.com/repository/maven-releases/com/android/support/support-annotations/maven-metadata.xml'. Received status code 500 from server: Internal Privoxy Error