1.gradle错误
1 UATHelper: Packaging (Android (ASTC)): ERROR: cmd.exe failed with args /c "E:\UE4Project426\PicoSDK_UE4_MobileDemo\Intermediate\Android\armv7\gradle\rungradle.bat" :app:assembleDebug 2 PackagingResults: Error: cmd.exe failed with args /c "E:\UE4Project426\PicoSDK_UE4_MobileDemo\Intermediate\Android\armv7\gradle\rungradle.bat" :app:assembleDebug 3 PackagingResults: Error: Unknown Error
解决方法，关闭UE4项目工程，找到项目文件夹本地位置，删除Intermediate文件夹，重新打开项目进行打包。
原文：https://www.cnblogs.com/seamus1995/p/14726628.html