How to run NCEM for own spatial data? about ncem HOT 2 OPEN

ncem.data = customLoader(
    adata=ad, cluster='clusters', patient=None, library_id=None, radius=52
)

adata_file='spatial_all_CSR.h5ad'
ad = an.read_h5ad(adata_file)
print(ad)
ncem = InterpreterInteraction()
print('step 1 done')
adata_vis = ad
print('step 2 done')
ncem.data = customLoader(adata=adata_vis, cluster='clusters', patient='None', library_id='None', radius=25)
print('step 3 done')

AnnData object with n_obs × n_vars = 393286 × 346
    obs: 'umi_sct', 'log_umi_sct', 'gene_sct', 'log_gene_sct', 'umi_per_gene_sct', 'log_umi_per_gene_sct', 'clusters'
    var: 'Intercept_sct', 'log_umi_sct', 'theta_sct', 'Intercept_step1_sct', 'log_umi_step1_sct', 'dispersion_step1_sct', 'genes_step1_sct', 'log10_gmean_sct'
    uns: 'spatial'
    obsm: 'spatial'
step 1 done
step 2 done
Loading data from raw files
registering celldata
Traceback (most recent call last):
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 3361, in get_loc
    return self._engine.get_loc(casted_key)
  File "pandas/_libs/index.pyx", line 76, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/index.pyx", line 108, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/hashtable_class_helper.pxi", line 5198, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas/_libs/hashtable_class_helper.pxi", line 5206, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'None'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "ncem_run.py", line 35, in <module>
    ncem.data = customLoader(adata=adata_vis, cluster='clusters', patient='None', library_id='None', radius=25)
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/ncem/data.py", line 1831, in __init__
    self.register_celldata(n_top_genes=n_top_genes)
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/ncem/data.py", line 1750, in register_celldata
    self._register_celldata(n_top_genes=n_top_genes)
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/ncem/data.py", line 1875, in _register_celldata
    for p in np.unique(celldata.obs[self.patient]):
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/pandas/core/frame.py", line 3458, in __getitem__
    indexer = self.columns.get_loc(key)
  File "/Users/agrawal/miniconda3/envs/ncem_new/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 3363, in get_loc
    raise KeyError(key) from err
KeyError: 'None'