create_array fails with ParamValidationError

[markus-zimmermann]

When creating an array I get a ParamValidationError when specifying path in open_group but not when specifying it in zarr.storage.FsspecStore.

So far I only observed it when creating arrays, opening groups and reading arrays works just fine. Is this a bug or am I missing something?

My environment:

# packages in environment at /opt/conda:
#
# Name                    Version                   Build  Channel
...
s3fs                      2025.3.2           pyhd8ed1ab_0    conda-forge
zarr                      3.0.6              pyhd8ed1ab_0    conda-forge
...

Method A (works)

fs = S3FileSystem(
    anon=False,
    endpoint_url=endpoint_url,
    asynchronous=True,
)
store = zarr.storage.FsspecStore(
    fs,
    path=path,
)
group = zarr.open_group(
    store,
    mode="a",
)
group.create_array(
    name=array_name,
    shape=array_shape,
    chunks=array_chunks,
    dtype=array_dtype,
    overwrite=True,
)

Method B (fails)

fs = S3FileSystem(
    anon=False,
    endpoint_url=endpoint_url,
    asynchronous=True,
)
store = zarr.storage.FsspecStore(
    fs,
)
group = zarr.open_group(
    store,
    path=path,
    mode="a",
)
group.create_array(
    name=array_name,
    shape=array_shape,
    chunks=array_chunks,
    dtype=array_dtype,
    overwrite=True,
)

produces an error message