pyscenic command execution issue in Singularity container

[williambi1]

Type of issue
test problem

Description of issue
Environment Information:
Singularity version: 4.3.4
Container image: aertslab/pyscenic:0.9.18(from Singularity Hub)
singularity pull --name aertslab-pyscenic-0.9.18.sif shub://aertslab/pySCENIC:0.9.18
Operating System: Ubuntu-22.04(WSL2)
When using singularity run command, I get the following error:

$ singularity run aertslab-pyscenic-0.9.18.sif pyscenic -h
python3: can't open file 'pyscenic': [Errno 2] No such file or directory

However, using singularity exec works correctly:

$ singularity exec aertslab-pyscenic-0.9.18.sif pyscenic -h
/usr/local/lib/python3.7/site-packages/dask/config.py:161: YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  data = yaml.load(f.read()) or {}
usage: pyscenic [-h] {grn,ctx,aucell} ...

Single-CEll regulatory Network Inference and Clustering (0.9.18)

positional arguments:
  {grn,ctx,aucell}  sub-command help
    grn             Derive co-expression modules from expression matrix.
    ctx             Find enriched motifs for a gene signature and optionally
                    prune targets from this signature based on cis-regulatory
                    cues.
    aucell          Quantify activity of gene signatures across single cells.

optional arguments:
  -h, --help        show this help message and exit

Arguments can be read from file using a @args.txt construct. For more
information on loom file format see http://loompy.org . For more information
on gmt file format see https://software.broadinstitute.org/cancer/software/gse
a/wiki/index.php/Data_formats .

Technical Analysis:
Verified that pyscenic executable exists inside the container:

$ singularity shell aertslab-pyscenic-0.9.18.sif
Singularity>  which pyscenic
/usr/local/bin/pyscenic

Expected Behavior:
Both singularity runand singularity execshould execute container commands normally.

Thank you for taking the time to read this question! Looking forward to your reply.