run example/vllm_embedding error

[zkailinzhang]

rendered_chat = compiled_template.render(
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home//.conda/envs/ml/lib/python3.12/site-packages/jinja2/environment.py", line 1295, in render
self.environment.handle_exception()
File "/home//.conda/envs/ml/lib/python3.12/site-packages/jinja2/environment.py", line 942, in handle_exception
raise rewrite_traceback_stack(source=source)
File "", line 16, in top-level template code
TypeError: can only concatenate str (not "list") to str
ERROR 02-09 11:10:04 [core_client.py:605] Engine core proc EngineCore_DP0 died unexpectedly, shutting down client.