`Fitting model failed for all gene` in `infer_grn` for muo_data.rds

[jiangpuxuan]

Hi,
I download the vignette data muo_data.rds
load the muo_data.rds as the object seurat_obj and running the vignette
here is my code

seurat_obj <- infer_grn(
    seurat_obj,
     peak_to_gene_method = 'Signac',
     genes = patterning_genes$symbol ,# HVG with tf annotation
     parallel = T ,
    group.by =orig.ident # the orig.ident of  muo_data.rds
)

the error message is Warning: Fitting model failed for xxxxxx until all genes have failed.

HOWEVER when i deprecated the group.by parameter like this:

seurat_obj <- infer_grn(
    seurat_obj,
     peak_to_gene_method = 'Signac',
     genes = patterning_genes$symbol ,# HVG with tf annotation
     parallel = T ,

)

No such error occured.

I appreciated the pando packages very much.
THank you for your help !