Snirf files not readable

Hi,

I am creating snirf files with pysnirf2 based on data collected with LSL in xdf format.
I then want to preprocess the data in the snirf files with MNE.
If I create the snirf files, the nirs group is an indexed group. So the key will be 'nirs1' as indexing starts with 1 in h5py, I believe.
In the snirf documentation (https://github.com/fNIRS/snirf/blob/master/snirf_specification.md#nirsiprobesourcepos2d)
the nirs group should also be an indexed group.
In Homer3 the created snirf files are readable.

However, with MNE I get an error that the file does not have the nirs element. This is expected as it searches for 'nirs' as a key but the key is actually 'nirs1'.

KeyError: "Unable to open object (object 'nirs' doesn't exist)"

And opening with h5py:

<KeysViewHDF5 ['nirs1']>

My question is, if anyone has any suggestions how to fix this or if there is an quick fix for my problem so that I can actually use my files in MNE?

Another question is, how to generally handle the nirs group. As far as I understand the snirf format is based on hdf5 format and indexing generally starts at 1? Snirf files created with the aurora directly use 'nirs' as a key. Is there any standard which way it should be?

I also attached the file.
subj3_mt_loc.snirf.zip

Thanks,
Carla

Start by reproducing the error with the attached subj3_mt_loc.snirf.zip file and inspecting its HDF5 keys with h5py. Read the MNE SNIRF-loading entry point where the nirs element is sought, then verify that the affected file can be opened and preprocessed without the KeyError.