PostProcessing Build Error: Copying File Failed..Again?

Specs:
-5.1.1p4
-Windows 7
-Build using il2cpp, release
-Image attached

I’ve ran into similar errors like this one in the past, but not this specific one. Upgrading to 5.1.1p4 patch fixed the last issues. This error popped up randomly, the only thing in Unity I modified was parenting a few objects, but that should have nothing to do with this.

Any clue?

I’m going to update to 5.1.2p1 since it looks like there was a significant amount of il2cpp fixes. Then i’ll give this an update.

Previous issue before upgrading to 5.1.1p4

UPDATE:
Fixed this error by updating to the 5.1.2p1

2249550--150293--PlaybackEngines-error.png

for me I had to disable antivirus while installing many of the 5.1.x qa patch versions…(although that error happened during install, no warnings after that)

Fixed this error by updating to the 5.1.2p1. But now receiving an odd xcode error.

xcode error: /…Desktop/Builds/Frameworks/Plugins/iOS/UnityAds.bundle: No such file or directory

xcode error: /…Desktop/Builds/Frameworks/Plugins/iOS/UnityAds.bundle: No such file or directory

Fixed by re-importing UnityAds.