Region in capital letters results in invalid URI for AWS SQS

Caused by: software.amazon.awssdk.core.exception.SdkClientException: Configured region (US_WEST_1) resulted in an invalid URI: https://sqs.US_WEST_1.amazonaws.com Valid region examples: [af-south-1, ap-east-1, ap-northeast-1, ap-northeast-2, ap-south-1, ap-southeast-1, ap-southeast-2, ca-central-1, eu-central-1, eu-north-1, eu-south-1, eu-west-1, eu-west-2, eu-west-3, fips-us-east-1, fips-us-east-2, fips-us-west-1, fips-us-west-2, me-south-1, sa-east-1, us-east-1, us-east-2, us-west-1, us-west-2, cn-north-1, cn-northwest-1, us-gov-east-1, us-gov-west-1, us-iso-east-1, us-isob-east-1]
[1]     at software.amazon.awssdk.core.exception.SdkClientException$BuilderImpl.build(SdkClientException.java:98)
[1]     at software.amazon.awssdk.core.exception.SdkClientException.create(SdkClientException.java:39)