Your AWS account has the following limits related to Application Load Balancers.
Regional Limits *
Load balancers per region: 20 ** Target groups per region: 200 Load Balancer Limits
Listeners per load balancer: 10 Targets per load balancer: 1000 Subnets per Availability Zone per load balancer: 1 Security groups per load balancer: 5 Rules per load balancer (not counting default rules): 10 Number of times a target can be registered per load balancer: 100 Listener Limits
Certificates per listener: 1 Target Group Limits
Load balancers per target group: 1 Targets per target group: 1000 Rule Limits
Conditions per rule: 1 Actions per rule: 1 Target groups per action: 1