solved : Every time i try to make distribution pack with keystore i get this error..

Development Platform & Builds Mobile
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error :
[unreal error - Pastebin.com

solved: i updated all android sdk using nvdia tool etc which fixed my all problems](unreal error - Pastebin.com)

2 

Signing key leela not found

Please make sure that your Key Alias in the keystore and in settings in UE4 are both the same.