TypeError: DataTree.__init__() got an unexpected keyword argument 'data'

[nicrie]

Describe the bug

With the recent release of xarray 2024.9 fitting rotator models results in the following error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
File /home/nrieger/Projects/teleconnections/mca.py:6
      eof.fit(X, dim="time")
      rot = xe.single.EOFRotator(n_modes=3)
----> rot.fit(eof)

File ~/Projects/xeofs/xeofs/single/eof_rotator.py:115, in EOFRotator.fit(self, model)
    self._fit_algorithm(model)
    if self._params["compute"]:
-->   self.compute()
     return self

File ~/Projects/xeofs/xeofs/base_model.py:64, in BaseModel.compute(self, **kwargs)
     """Compute and load delayed model results.
     
     Parameters
   (...)
     Additional keyword arguments to pass to `dask.compute()`.
     """
     # find and compute all dask arrays simultaneously to allow dask to optimize the
     # shared graph and avoid duplicate i/o and computations
---> dt = self.serialize()
     data_objs = {
          k: v
          for k, v in dt.to_dict().items()
          if data_is_dask(v) and v.attrs.get("allow_compute", True)
     }
     (data_objs,) = dask.base.compute(data_objs, **kwargs)

File ~/Projects/xeofs/xeofs/base_model.py:93, in BaseModel.serialize(self)
     # Create a root node for this object with its params as attrs
     ds_root = xr.Dataset(attrs=dict(params=self.get_params()))
---> dt = DataTree(data=ds_root, name=type(self).__name__)
     # Retrieve the tree representation of each attached object, or set basic attrs
     for key, attr in self.get_serialization_attrs().items():

TypeError: DataTree.__init__() got an unexpected keyword argument 'data'

Reproducible Minimal Working Example

import xarray as xr
import xeofs as xe

X = xr.tutorial.open_dataset("air_temperature").air

eof = xe.single.EOF(n_modes=3)
eof.fit(X, dim="time")
rot = xe.single.EOFRotator(n_modes=3)
rot.fit(eof)   <- fails!

Expected behavior
Rotation runs without error.

Desktop (please complete the following information):

• OS: Ubuntu 22.04
• xeofs version 3.0.1

Additional context
Just checking the what's new page of xarray, it seems that there were two merged PRs regarding datatree that may be responsible for the break: PR9276 and PR9292. Any ideas here @slevang ?