Issue while deploying application in acc environment

Hi, I already deployed my application in acceptance environment multiple times and tested. But now I am facing some issue(Error) while deploying application. Below is the screenshot of Status with red cross but previously it was green mark: how can I deploy my changes?
1 answers

Indeed: check the logs.

Also check the alerts page and its history tab. 

Maybe stop and then restart with the new package.

The status reflected does not necessarily mean your app is not running. It can also mean eg there has been a critical error some time recently… Check