UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): BUILD FAILED in 17s
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): ERROR: cmd.exe failed with args /c “E:\ue project\endless\Intermediate\Android\armv7\gradle\rungradle.bat” :app:assembleDebug
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): Took 22.2851984s to run UnrealBuildTool.exe, ExitCode=6
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): UnrealBuildTool failed. See log for more details. (C:\Users\dasan\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+UE_4.26\UBT-endless-Android-Shipping.txt)
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): AutomationTool exiting with ExitCode=6 (6)
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): BUILD FAILED
PackagingResults: Error: cmd.exe failed with args /c “E:\ue project\endless\Intermediate\Android\armv7\gradle\rungradle.bat” :app:assembleDebug
PackagingResults: Error: Unknown Error
It could be caused by an incorrect or outdated Gradle version, or by missing dependencies in the project. Another possible cause could be a problem with the Android SDK, such as missing or outdated components.
I suggest trying to package a completely blank project, let me know if you get the same errors then.
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): BUILD FAILED in 16s
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): ERROR: cmd.exe failed with args /c “E:\ue project\mobiletest\Intermediate\Android\armv7\gradle\rungradle.bat” :app:assembleDebug
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): (see C:\Users\dasan\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+UE_4.26\Log.txt for full exception trace)
PackagingResults: Error: cmd.exe failed with args /c “E:\ue project\mobiletest\Intermediate\Android\armv7\gradle\rungradle.bat” :app:assembleDebug
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): BUILD FAILED
PackagingResults: Error: Unknown Error
You can’t have spaces in a path.
This works: C:\project\123.
This doesn’t work: C:\Unreal Projects\123.
Yeah, the installation process is a bit strange at times. I had to change the .bat script to fit the proper path in my example.
If it says that it can’t find files, then you probably should reinstall it.
I think you already have access to this, and have read it, but in any case: Android Game Development | Unreal Engine 4.27 Documentation
This is a good tutorial: Installing & Building to Android (AR, VR, Mobile) UE5 | Unreal Engine 5 - YouTube. There were some changes done with Android between versions, so I suggest you try to install the latest Unreal Engine version before you continue.
Is there a particular reason for why you are using 4.26? 
low configuration… money problem 
thank you 