Failed to fetch session output

This looks like a really cool project.  I got it all setup but got an error trying to use the /output command.  Any idea what I'm doing wrong?

Using Claude 2.0.31

Thanks...

<img width="369" height="170" alt="Image" src="https://github.com/user-attachments/assets/ea9d7804-0ca1-455a-b8cc-e25db1a46c8c" />