module-09-structured-outputs  It's not working

=== Module 09: Structured Outputs ===

--- Example 1: Simple Structured Output ---

SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.

Then it got stuck there.

