Request with API are Accepted but do not progress to ‘Running’

Hello, When I try to download the CERRA sub-daily regional reanalysis data for Europe at height levels from 1984 fom Copernicus https://cds.climate.copernicus.eu/datasets/reanalysis-cerra-height-levels?tab=download to the present using the API and your script, my requests are Accepted but do not progress to ‘Running’. They simply remain at ‘Accepted’. However, if I make the request by manually selecting the fields on your website, it works. Here is the API request I use:

import cdsapi

client = cdsapi.Client(debug=True, quiet=False, timeout=600)

dataset = “reanalysis-cerra-height-levels”
request = {
“variable”: [“turbulent_kinetic_energy”],
“height_level”: [“500_m”],
“data_type”: [“reanalysis”],
“product_type”: [“forecast”],
“year”: [“2017”],
“month”: [“01”],
“day”: [“01”],
“time”: [“00:00”],
“leadtime_hour”: [“1”],
“data_format”: “netcdf”
}

result = client.retrieve(dataset, request)
result.download(“test.nc”)

What should I do?

Thanks , Regards