I packed my game in ETC2 and connected my androind phone and tried to test it in my phone, but it gives me the error

Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES: Package /data/app/vmdl1048668666.tmp/base.apk has no certificates at entry AndroidManifest.xml]
Things to try:
Check that the device (and only the device) is listed with “ADB$ devices” from a command prompt.
Make sure all Developer options look normal on the device
Check that the device has an SD card.

I dont know what to do anymore, can someone help please?