TypeError: can only concatenate str (not "NoneType") to str
Traceback:
File "/opt/miniconda3/envs/py310_chat/lib/python3.10/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 542, in _run_script
exec(code, module.__dict__)
File "/mnt/sda/github/03yue/RepoChat-200k/app.py", line 190, in <module>
create_app()
File "/mnt/sda/github/03yue/RepoChat-200k/app.py", line 182, in create_app
stream_handler.process_token(content)
File "/mnt/sda/github/03yue/RepoChat-200k/app.py", line 17, in process_token
self.text += token