Serverless deploy failing in ap-south-1 with Serverless error ---------- Invalid character in entity name Line: 0 Column: 382 Char: = but working in other regions

Serverless: Packaging service…
Serverless: Excluding development dependencies…
Serverless: Injecting required Python packages to package…
Serverless: Creating Stack…
Serverless: Checking Stack create progress…
CloudFormation - CREATE_IN_PROGRESS - AWS::CloudFormation::Stack - test-serverless-dev
CloudFormation - CREATE_IN_PROGRESS - AWS::S3::Bucket - ServerlessDeploymentBucket
CloudFormation - CREATE_IN_PROGRESS - AWS::S3::Bucket - ServerlessDeploymentBucket
CloudFormation - CREATE_COMPLETE - AWS::S3::Bucket - ServerlessDeploymentBucket
CloudFormation - CREATE_IN_PROGRESS - AWS::S3::BucketPolicy - ServerlessDeploymentBucketPolicy
CloudFormation - CREATE_IN_PROGRESS - AWS::S3::BucketPolicy - ServerlessDeploymentBucketPolicy
CloudFormation - CREATE_COMPLETE - AWS::S3::BucketPolicy - ServerlessDeploymentBucketPolicy
CloudFormation - CREATE_COMPLETE - AWS::CloudFormation::Stack - test-serverless-dev
Serverless: Stack create finished…

Serverless Error ----------------------------------------

Invalid character in entity name
Line: 0
Column: 382
Char: =

Your Environment Information ---------------------------
Operating System: linux
Node Version: 14.16.0
Framework Version: 2.31.0
Plugin Version: 4.5.2
SDK Version: 4.2.2
Components Version: 3.7.7

The same deployment doesn’t give this error in other aws regions and deployment is successful. Any resolution for this error? Please let me know how to resolve.
Thank you