Why does my AWS CodeBuild project fail to create a CloudFormation stack with the error "Template file not found"?

I am working on automating the deployment of a static website using AWS CodePipeline and CodeBuild, along with CloudFormation. However, I am encountering some issues in my buildspec.yml configuration. Failed phase message: Error while executing command: aws cloudformation validate-template –template-body s3_static_web.yml.