Configuration validation exception: Invalid option - error

Question

When I click on my environment in the web console, it now refuses to load and gives the message:   
  
"A problem occurred while loading your page: Configuration validation exception: Invalid option specification (Namespace: 'aws:ec2:instances', OptionName: 'InstanceTypes'): Unknown configuration setting."  
  
How does one recover from this?  I can't even enter my configuration to fix the problem?  
  
Same error when using the CLI to force the InstanceType:

```
aws elasticbeanstalk update-environment --environment-name "webapp-dev2-1" --option-settings "Namespace=aws:autoscaling:launchconfiguration,OptionName=InstanceType,Value=t3.medium"
```

```
An error occurred (ConfigurationValidationException) when calling the UpdateEnvironment operation: Configuration validation exception: Invalid option specification (Namespace: 'aws:ec2:instances', OptionName: 'InstanceTypes'): Unknown configuration setting.
```

Edited by: darrylC on Nov 19, 2019 10:48 AM

Answer

I filed AWS Support case 6607620201 about this.

Answer

I'm getting the same issue.  Yesterday, at 2019-11-18 23:50 PST, our CI process started getting this error when querying an Elastic Beanstalk application.

```
$ terraform version
Terraform v0.12.14
+ provider.archive v1.3.0
+ provider.aws v2.38.0
+ provider.local v1.4.0
+ provider.random v2.2.1
+ provider.twilio (unversioned)

Your version of Terraform is out of date! The latest version
is 0.12.16. You can update by downloading from https://www.terraform.io/downloads.html
$ terraform validate
Success! The configuration is valid.

$ terraform plan -out plan.txt
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.

...

module.backend.aws_elastic_beanstalk_application_version.api_service: Refreshing state... [id= nnnn]
module.backend.aws_elastic_beanstalk_environment.api_service: Refreshing state... [id=e-nnnn]

Error: ConfigurationValidationException: Configuration validation exception: Invalid option specification (Namespace: 'aws:ec2:instances', OptionName: 'InstanceTypes'): Unknown configuration setting.
	status code: 400, request id: c00f9ba0-e3de-4b15-8a74-72faee57314e[0m
```

Edited by: mleonhard on Nov 20, 2019 5:18 PM

Configuration validation exception: Invalid option - error

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