xESMF: Installation through conda, import xesmf fails

Hello, I have installed xesmf through conda (I include the other libraries I used) :

conda create -n xesmf_env
conda activate xesmf_env

conda install -c conda-forge xesmf
conda install -c conda-forge dask netCDF4
conda install -c conda-forge matplotlib cartopy jupyterlab

And when I execute import xesmf, I get :

ERROR:
>>> import xesmf
Traceback (most recent call last):
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\esmpy\interface\loadESMF.py", line 26, in <module>
    esmfmk = os.environ["ESMFMKFILE"]
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\os.py", line 680, in __getitem__
    raise KeyError(key) from None
KeyError: 'ESMFMKFILE'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\xesmf\backend.py", line 22, in <module>
    import esmpy as ESMF
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\esmpy\__init__.py", line 112, in <module>
    from esmpy.api.esmpymanager import *
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\esmpy\api\esmpymanager.py", line 9, in <module>
    from esmpy.interface.cbindings import *
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\esmpy\interface\cbindings.py", line 13, in <module>
    from esmpy.interface.loadESMF import _ESMF
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\esmpy\interface\loadESMF.py", line 28, in <module>
    raise ImportError('The ESMFMKFILE environment variable is not available.')
ImportError: The ESMFMKFILE environment variable is not available.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\xesmf\__init__.py", line 4, in <module>
    from .frontend import Regridder, SpatialAverager
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\xesmf\frontend.py", line 12, in <module>
    from .backend import Grid, LocStream, Mesh, add_corner, esmf_regrid_build, esmf_regrid_finalize
  File "C:\Users\adrie\miniconda3\envs\xesmf_env\lib\site-packages\xesmf\backend.py", line 24, in <module>
    import ESMF
ModuleNotFoundError: No module named 'ESMF'


ERROR IMPORTING ESMF:
>>> import ESMF
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'ESMF'

This used to work a few months ago, the error appeared when I needed to use the library again since last week.

I tried to revert to an older version (0.6.3) and to install with pip, same issue. 2 other coworkers have tried and faced the same issue on their computer.

Thanks for any help!