Unity5 APIUpdater encountered some issues and was not able to finish.

• Unity5 APIUpdater encountered some issues and was not able to finish.
  Ran the updater, then searched the editor log for "upgradable" or "UnityUpgradable"and manually fixed the issues.

• 参考链接 https://forum.unity.com/threads/unity-5-6-apiupdater-encountered-some-issues-and-was-not-able-to-finish.464240/