VTK example can't work

[zengzhengrong]

https://examples.vtk.org/site/Trame/Applications/FiniteElementAnalysis/FiniteElementAnalysis/

Upload nodes_file and elems_file raise error

App running at:
 - Local:   http://localhost:8080/
 - Network: http://192.168.10.110:8080/

Note that for multi-users you need to use and configure a launcher.
And to prevent your browser from opening, add '--server' to your command line.
ERROR:root:Exception raised
ERROR:root:AttributeError("'list' object has no attribute 'decode'")
ERROR:root:Traceback (most recent call last):
  File "C:\Users\Win\AppData\Local\Programs\Python\Python39\lib\site-packages\wslink\protocol.py", line 321, in onMessage
    results = func(*args, **kwargs)
  File "C:\Users\Win\AppData\Local\Programs\Python\Python39\lib\site-packages\trame_server\protocol.py", line 208, in update_state
    self.server.state.update(client_state)
  File "C:\Users\Win\AppData\Local\Programs\Python\Python39\lib\site-packages\trame_server\state.py", line 226, in __exit__
    self.flush()
  File "C:\Users\Win\AppData\Local\Programs\Python\Python39\lib\site-packages\trame_server\state.py", line 199, in flush
    coroutine = callback(**self._pushed_state)
  File "c:\Users\Win\Documents\GitHub\vtk-examples\src\Trame\Applications\FiniteElementAnalysis\app_remote_view.py", line 89, in update_grid
    io.StringIO(nodes_bytes.decode("utf-8")),
AttributeError: 'list' object has no attribute 'decode'