running example3.py fails at perform_layout method

Python version: 3.12.5
OS: Windows 11
nanogui version :  0.3.0

running the provided example3.py fails with error :
``` cmd
File "C:\Users\User\...\example3.py", line 204, in __init__
    self.perform_layout()
RuntimeError: nanobind::detail::get_trampoline('__main__.MyCanvas::preferred_size_impl()'): lookup failed!
```