Looks like your .pkg is on a mounted volume named Video Streaming.
"An error occurred while running scripts from the package “Acrobat XI Pro - CC_Install.pkg”." UserInfo=0x7f943af1bd50 {NSFilePath=./preinstall, NSURL=file://localhost/Volumes/Video %20Streaming/Adobe%20Packages/Acrobat%20XI%20Pro%20-%20CC/Build/Acrob at%20XI%20Pro%20- %20CC_Install.pkg, PKInstallPackageIdentifier=com.adobe.Enterprise.install. 8719B14F-19DE-4540-935A-7B881EC72E8E, NSLocalizedDescription=An error occurred while running scripts from the package “Acrobat XI Pro - CC_Install.pkg”.} {