GWTC-4 not fetched using fetch_open_samples

I have tried to use last version 1.5.2 of PESummary to fetch GWTC-4 catalog data without success. For instance:

file_name = fetch_open_samples('GW231226_101520', unpack=False, read_file=False, delete_on_exit=False, outdir="./", verbose=True)

gives the error:

Unknown URL for GW231226. If the URL is known, please run download_and_read_file(URL)

I tried also GW231226, or add catalog="GWTC-4" in the argument sequence, but get still an error.