Have you modified the application in any way or this just happened after deployment? - This is being shown after a week from deployment.
Which is the AMI id? - bitnami-mautic-2.10.0-0-linux-ubuntu-14.04-x86_64-hvm-ebs-mp-8543d831-7f5d-4e2b-a153-0e7860c96e45-ami-cfeaf2b4.4 (ami-b67d9acc)
How did you launch the image? Directly from AWS console or using the Bitnami AWS Launchpad? Through URL.
In which kind of instance did you deploy Mautic? I didn't quite understand this. Mautic runs on EC2.
How did you configure the email? Manually, using SMTP from AWS.