That is odd. I checked your bot's logs, and did not see any errors, and did not see any errors logged on Google Play in the last 7 days (but I did see some older errors that we will look into).
It may have been some sort of communications failure with the server that caused the issue.
Ensure you have upgraded to the latest version.
Where did you see the word "Last"?
We also have a mobile friendly website, http://www.botlibre.com that has more functionality than the app.