An beanstalk app that works fine until recently

Hi - We deployed an elastic beanstalk app (the last update made on 03/01/2022) and it has been working just fine. But the app is not working now - When I checked, the webpage shows "502 - Bad Gateway".

We used the python 3.8 platform branch. Has there been any updates between March and now? More importantly, can AWS restore our services back to 03/02/2022 when it was working?

Thanks!