Having Difficulty Releasing For Android Studios

I am currently having issues releasing my game to the play store but have no issues with the app store. I went through the process of "Generate sign apk" but in the end, i do not get a generated key for me to upload to google play store. Please help! Attached below is the error i'm receiving.
Bottom left shows "X" in "Run Tasks" and on the bottom right after generating signed apk shows "error while building apk. I cannot get passed this part.

 

The error it gives is over the KEY, it must generate a if it does not.

 

Search for how to create a keystore and generate a keystore file to sign the app .

 

I updated "Key0" to a new key name. Still ending up with same picture as initial post.