Option Strict On disallows late binding for each

Hello All

New to Ui Path.need help to understand the error

06:33:18:089 => [ERROR] [UiPath.Workflow.Logging.StudioTraceListener] [44] System.Activities.InvalidWorkflowException: The workflow has validation errors. Review and resolve them first. —> System.Activities.ValidationException: Compiler error(s) encountered processing expression ““Mail.subject- Buy Products Online at Best Price in India - All Categories | Flipkart.com””.
Option Strict On disallows late binding.

— End of inner exception stack trace —

Thanks
krishnaprasad