Entry point sh format error

[fortdev210]

exec /entrypoint.sh: exec format error
I pulled the branch v4 and created a local image based on that dockerfile.
I pushed that local image to aws ecr and connected to the aws ecs.
But i got over issue.
docker pull mautic/mautic:v4
I saw this command on docker hub and is this based on the v4 branch of docker-mautic repo? (https://github.com/mautic/docker-mautic)