Error on downloading auxiliaries

[NixBio]

Base Information

Distributor ID: Debian
Description:    Debian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye
Python 3.7.12
snakemake 8.20.6

call
./modr install --ref-path /mypath/software/ngs/BioinfCore/modr_auxilaries/ --force --threads 12

output:

./modr install --ref-path /mypath/software/ngs/BioinfCore/modr_auxilaries/ --force --threads 12
modr (0.6.1)
Merging chunks...
Extracting tarball... /mypath/software/ngs/BioinfCore/modr_auxilaries/merged_chunks.tar.gz
Traceback (most recent call last):
  File "/mypath/software/package/miniconda3/lib/python3.7/shutil.py", line 932, in _unpack_tarfile
    tarobj = tarfile.open(filename)
  File "/mypath/software/package/miniconda3/lib/python3.7/tarfile.py", line 1580, in open
    raise ReadError("file could not be opened successfully")
tarfile.ReadError: file could not be opened successfully

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./modr", line 1236, in <module>
    main()
  File "./modr", line 1232, in main
    args.func(args)
  File "./modr", line 360, in install
    unpack_archive(tarball, sub_args.ref_path)
  File "/mypath/software/package/miniconda3/lib/python3.7/shutil.py", line 1002, in unpack_archive
    func(filename, extract_dir, **kwargs)
  File "/mypath/software/package/miniconda3/lib/python3.7/shutil.py", line 935, in _unpack_tarfile
    "%s is not a compressed or uncompressed tar file" % filename)
shutil.ReadError: /mypath/software/ngs/BioinfCore/modr_auxilaries/merged_chunks.tar.gz is not a compressed or uncompressed tar file

checking the download

ls -ahl
drwxrwxr-x+  2 ID group   42 Oct 11 15:50 .
drwxrwxr-x+ 16 ID group 4.0K Oct 11 15:48 ..
-rw-rw-r--+  1 ID group    0 Oct 11 16:30 merged_chunks.tar.gz

I could not find a hint where this should be pulled from, the install.json does not contain much.