APK Not Sign

Hi
I am trying to export my game form unreal engine 4.27 the package building is sucessful but waring massage shows “APK won’t be signed and thus not installable unless you also pass a keystore via the flag --ks” . I used keystore commnd in CMD prompt and genrate .keystore file. copy that in Build\android folder & add all info in unreal engine but still showing same error. I can’t upload apk on play store or can’t install game in mobile.

Anyone pls help me out regarding this issue.

Thanks in advance.

i have same issue in 5.1.1 source. have you found solution?