AutomationTool exiting with ExitCode=1 (Error_Unknown)

Hi . I got this error: Any Solution, please
ERROR: cmd.exe failed with args /c “C:\Users\alaaf\Documents\Unreal Projects\unreal3\Intermediate\Android\armv7\gradle\rungradle.bat” :app:assembleDebug
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): (see C:\Users\alaaf\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.25\Log.txt for full exception trace)
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Android (Multi:ASTC,DXT,ETC2)): BUILD FAILED

It says there is a LOG file on your computer that can tell you more about the error.

C:\Users\alaaf\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.25\Log.txt

Open this LOG and Search ERROR.

This will give you a better idea of the real Error.

Thank you very much for your answer. I just sorted it out. I have removed the .gradle folder and build it again. the Unreal downloads fresh gradle contains and it worked without error.