If this is an unexpected issue and persists you can inspect it running `pod repo update --verbose`

执行命令：pod update --verbose。报错：If this is an unexpected issue and persists you can inspect it running ​​pod repo update --verbose​​​ 解决方案：网络问题。连接正常的网络。关闭登录客户端，重新更新。
注意：就是你网络恢复正常，还在原来的登录客户端上执行：pod update --verbose命令仍旧可能报错。关系客户端重新执行命令就正常了。
关闭客户端，重新执行命令：pod update --verbose。报新的错误：

jgs:ChildishBeautyParent mac$  pod repo update
Updating spec repo `0-iosteam-bingospec`
  $ /usr/bin/git -C /Users/jiaguoshang/.cocoapods/repos/0-iosteam-bingospec
  fetch origin --progress
  fatal: unable to access 'http://192.162.12.188:8686/iOSTeam/BWGoSpec.git/': The requested URL returned error: 500
[!] CocoaPods was not able to update the `0-iosteam-bingospec` repo. If this is an unexpected issue and persists you can inspect it running `pod repo update --verbose`

经过检查是，私有库所在磁盘空间用尽了。