def load_eikon_data():
    Cnt = 'TRDEBFVWc1'
    startdate = '2015-01-01T00:00:00'
    enddate = '2020-05-12T00:00:00'
    interval = 'daily'

    df = ek.get_timeseries(
        [Cnt],
        fields=['LAST']
        start_date=startdate,
        end_date=enddate,
        interval=interval
    )
        print(df)

    return None

results in

TRDEBFVWc1 LAST

Date

2015-01-01 NaN

2015-01-02 NaN

2015-01-05 NaN

2015-01-06 NaN

2015-01-07 NaN

... ...

2020-05-06 NaN

2020-05-07 NaN

2020-05-08 NaN

2020-05-11 NaN

2020-05-12 NaN