scib: RRuntimeError: Unable to find an inherited method for function ‘assay’ for signature ‘"dgCMatrix", "character"’

I’m trying to troubleshoot a bug associate with a package I’m working on with @LuckyMD (https://github.com/singlecellopenproblems/SingleCellOpenProblems). I tried using toy data and am getting this error

import anndata
import numpy as np
import scIB.preprocessing

adata = anndata.AnnData(np.random.normal(100,1, size=(3000,1000)))
scIB.preprocessing.normalize(adata)

raises

---------------------------------------------------------------------------
RRuntimeError                             Traceback (most recent call last)
<ipython-input-1-68c695ef7288> in <module>
      4
      5 adata = anndata.AnnData(np.random.normal(100,1, size=(3000,1000)))
----> 6 scIB.preprocessing.normalize(adata)

~/.local/lib/python3.8/site-packages/scIB/preprocessing.py in normalize(adata, min_mean)
    168     ro.globalenv['data_mat'] = adata.X.T
    169     ro.globalenv['input_groups'] = adata_pp.obs['groups']
--> 170     size_factors = ro.r(f'computeSumFactors(data_mat, clusters = input_groups, min.mean = {min_mean})')
    171     del adata_pp
    172

/usr/lib/python3.8/site-packages/rpy2/robjects/__init__.py in __call__(self, string)
    414     def __call__(self, string):
    415         p = rinterface.parse(string)
--> 416         res = self.eval(p)
    417         return conversion.rpy2py(res)
    418

/usr/lib/python3.8/site-packages/rpy2/robjects/functions.py in __call__(self, *args, **kwargs)
    195                 v = kwargs.pop(k)
    196                 kwargs[r_k] = v
--> 197         return (super(SignatureTranslatedFunction, self)
    198                 .__call__(*args, **kwargs))
    199

/usr/lib/python3.8/site-packages/rpy2/robjects/functions.py in __call__(self, *args, **kwargs)
    123             else:
    124                 new_kwargs[k] = conversion.py2rpy(v)
--> 125         res = super(Function, self).__call__(*new_args, **new_kwargs)
    126         res = conversion.rpy2py(res)
    127         return res

/usr/lib/python3.8/site-packages/rpy2/rinterface_lib/conversion.py in _(*args, **kwargs)
     42 def _cdata_res_to_rinterface(function):
     43     def _(*args, **kwargs):
---> 44         cdata = function(*args, **kwargs)
     45         # TODO: test cdata is of the expected CType
     46         return _cdata_to_rinterface(cdata)

/usr/lib/python3.8/site-packages/rpy2/rinterface.py in __call__(self, *args, **kwargs)
    622                     error_occured))
    623             if error_occured[0]:
--> 624                 raise embedded.RRuntimeError(_rinterface._geterrmessage())
    625         return res
    626

RRuntimeError: Error in (function (classes, fdef, mtable)  :
  unable to find an inherited method for function ‘assay’ for signature ‘"dgCMatrix", "character"’

I’m have the following package versions installed

anndata 0.7.4
scanpy 1.4.5.post3
rpy2 3.3.5
anndata2ri 1.0.3
scanorama 1.6
memory_profiler 0.57.0
networkx 2.4
igraph 0.8.2
louvain 0.6.1