problem that makes the whole thing not function

[bigj333]

On step 4 on the google colab
`/content/osumapper/v7.0/act_newmap_prep.py in step4_read_new_map(file_path, divisor)
26
27 start = time.time()
---> 28 read_and_save_osu_tester_file(file_path.strip(), filename="mapthis", divisor=divisor);
29 end = time.time()

/content/osumapper/v7.0/audio_tools.py in read_and_save_osu_tester_file(path, filename, json_name, divisor)
206
207 # ticks = ticks from each uninherited timing section
--> 208 ticks, timestamps, tick_lengths, slider_lengths = get_all_ticks_and_lengths_from_ts(osu_dict["timing"]["uts"], osu_dict["timing"]["ts"], file_len, divisor=divisor);
209
210 # old version to determine ticks (all from start)

/content/osumapper/v7.0/map_analyze.py in get_all_ticks_and_lengths_from_ts(uts_array, ts_array, end_time, divisor)
78 tick_len = [[uts["tickLength"]] * len(np.arange(uts["beginTime"], endtimes[i], uts["tickLength"] / divisor)) for i, uts in enumerate(uts_array)];
79 # slider_len = [[ts["sliderLength"]] * len(np.arange(ts["beginTime"], endtimes[i], ts["tickLength"] / divisor)) for i, ts in enumerate(ts_array)];
---> 80 slider_len = [get_slider_len_ts(ts_array, timestamp) for timestamp in np.concatenate(timestamps)];
81 return np.concatenate(ticks_from_uts), np.round(np.concatenate(timestamps)).astype(int), np.concatenate(tick_len), np.array(slider_len);
82

/usr/local/lib/python3.10/dist-packages/numpy/core/overrides.py in concatenate(*args, **kwargs)

ValueError: need at least one array to concatenate`