Error when building

Hi, I am getting this error please help.

2022-09-29T08:02:49.411 runner[e69d0c5b] ams [info] Starting instance

2022-09-29T08:02:49.748 runner[e69d0c5b] ams [info] Configuring virtual machine

2022-09-29T08:02:49.753 runner[e69d0c5b] ams [info] Pulling container image

2022-09-29T08:02:50.551 runner[e69d0c5b] ams [info] Unpacking image

2022-09-29T08:02:50.561 runner[e69d0c5b] ams [info] Preparing kernel init

2022-09-29T08:02:50.933 runner[e69d0c5b] ams [info] Configuring firecracker

2022-09-29T08:02:51.030 runner[e69d0c5b] ams [info] Starting virtual machine

2022-09-29T08:02:51.203 app[e69d0c5b] ams [info] Starting init (commit: 249766e)...

2022-09-29T08:02:51.254 app[e69d0c5b] ams [info] Preparing to run: `/cnb/process/web` as heroku

2022-09-29T08:02:51.285 app[e69d0c5b] ams [info] 2022/09/29 08:02:51 listening on [fdaa:0:44ed:a7b:c207:e69d:c5b:2]:22 (DNS: [fdaa::3]:53)

2022-09-29T08:02:52.268 app[e69d0c5b] ams [info] Starting clean up.```

Per my understanding, the error (Starting clean up) you’re seeing means either the main (entrypoint) app process couldn’t be started (that’d mean /cnb/process/web couldn’t be run as user heroku) or health-checks (as defined in your .toml) failed.

Other reasons I’ve seen of late: