I ran into this gotcha but my solution was different. My system time was valid, but maybe it was several minutes off. Anyway if you run into this message but appear to have a correct system time, here are two things I did which worked
- Wait several minutes (e.g. search stackoverflow for this)
- Rename the .apk.
Then try to upload again. It just worked for me the second time.
Another issue I ran into was ant release
reporting that the keystore was tampered with or my password was incorrect when I signed my app. All I did was retry a second time and ant release
just went through.