ModuleNotFoundError: No module named 'vaex.ext.bqplot' about vaex HOT 6 OPEN

ds.plot_widget('x', 'y', 'z', backend='ipyvolume')

Traceback (most recent call last):

  File "/usr/local/lib/python3.8/site-packages/IPython/core/interactiveshell.py", line 3417, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-146-b71ac5f47cfb>", line 1, in <module>
    sds.plot_widget('x', 'y', 'z', what='mean(A0_p50)', backend='ipyvolume')

  File "/usr/local/lib/python3.8/site-packages/vaex/utils.py", line 57, in wraps2
    return f(*args, **kwargs)

  File "/usr/local/lib/python3.8/site-packages/vaex/dataframe.py", line 1698, in plot_widget
    return self.widget.heatmap(x, y, limits=limits, transform=f, **kwargs)

  File "/usr/local/lib/python3.8/site-packages/vaex/jupyter/__init__.py", line 110, in heatmap
    x, y = self._axes([x, y], limits)

  File "/usr/local/lib/python3.8/site-packages/vaex/jupyter/__init__.py", line 73, in _axes
    limits = self.df.limits(expressions, limits)

  File "/usr/local/lib/python3.8/site-packages/vaex/dataframe.py", line 1595, in limits
    number = ast.literal_eval(number)

  File "/usr/local/Cellar/[email protected]/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ast.py", line 59, in literal_eval
    node_or_string = parse(node_or_string, mode='eval')

  File "/usr/local/Cellar/[email protected]/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ast.py", line 47, in parse
    return compile(source, filename, mode, flags,

  File "<unknown>", line unknown
    
    ^
SyntaxError: unexpected EOF while parsing