Can't access Elastic Beanstalk configuration page

Question

For one of my environments, I receive the following error:

A problem occurred while loading your page: Configuration validation exception: Invalid option specification (Namespace: 'aws:autoscaling:launchconfiguration', OptionName: 'InstanceType'): Your selected instance types (t1.micro) aren't available in your selected VPC Subnets. t1.micro is available in [us-east-1a, us-east-1b, us-east-1c, us-east-1d, us-east-1f]. Please check your VPC Subnets.

Does anyone know how I can change the subnet when I can't access the page to do so?

Answer

The [docs](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/command-options-general.html#command-options-general-autoscalinglaunchconfiguration) call out the following...

"*The InstanceType option is obsolete. It's replaced by the newer and more powerful InstanceTypes option in the aws:ec2:instances namespace. You can use this new option to specify a list of one or more instance types for your environment. The first value on that list is equivalent to the value of the InstanceType option that's included in the aws:autoscaling:launchconfiguration namespace that's described here.*"

"*The instance types that are available depend on the Availability Zones and Region used. If you choose a subnet, the Availability Zone that contains that subnet determines the available instance types.*"

Consider updating the configuration through the EB CLI. Refer to 
* [Using the Elastic Beanstalk command line interface (EB CLI)](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb-cli3.html)
* [eb config](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb3-config.html)

Can't access Elastic Beanstalk configuration page

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