runtime error

IMPORTANT: You are using gradio version 3.18.0, however version 4.29.0 is available, please upgrade. -------- Traceback (most recent call last): File "/home/user/app/app.py", line 43, in <module> iface.add_button("Toggle WebSocket Server", toggle_server) AttributeError: 'Interface' object has no attribute 'add_button'

Container logs: