In the navigation pane, in the LOAD BALANCING section, choose Load Balancers.
On the Description tab for your load balancer, in the Security section, choose your security group.
Choose the Outbound tab for your security group and then confirm that your security group has an egress rule that meets your requirements. Note: For more information on adding, updating, and/or deleting security group rules, see Work with security group rules-,Work%20with%20security%20group%20rules,-The%20following%20tasks).
Confirm that your network access control list (ACL) allows the required ingress and egress traffic
In the navigation pane, in the Virtual Private Cloud section, choose Subnets.
Select the subnet attached to your Elastic Beanstalk EC2 instance.
Choose the Network ACL tab and then confirm that the inbound and outbound rules meet your traffic requirements. Note: For more information on adding and deleting rules from an ACL, see Add and delete rules.
Confirm that the health check path is properly set for your application
Set the health check path for your type of load balancer: