Why I cant modify the Alias Key?

I tried to add Alias key But there is only one marked choice 'unsigned (debug)

Since the user is no longer active. I will explain the problems I faced and how stumbled across this problem and fixed it.

I was able to build apk previously. But when my internet was down for a couple of days, I couldn’t build my apk anymore (see attachments for what error I was facing when I was offline and trying to build apk).


Anyways, I was working offline in Unity. When I came back online, even after being signed in of my account It was showing unsigned in the alias field.

The fix was to close the project completely and restart Unity. Sign out of the unity account. And sign in again. That’s it.

Also, it’s a request for everybody to answer these type of build questions as it is hard enough to make games and these types of error makes it even more difficult. Thank you!