I can help you troubleshoot the error you're encountering when sending a list. However, I'll need more information to assist you effectively. Here are a few questions that might help clarify the situation:
1. **What kind of list are you trying to send?** Are you sending it in an application, via email, or in a programming context (like sending data between services)?
2. **What type of error are you receiving?** Please provide the error message