Error when training from GUI

[GrunCrow]

Describe the bug I open the GUI select the folder where I have the audio segments in folders with specie name as in the labels TXT, leave default parameters and when train, data start to load, I have some generic classes such as Sturnus, Passer... that load data correctly but in the generic class Bird it just gives an Error after loading 6-10 samples (there are around 130 in Bird folder).

To Reproduce Steps to reproduce the behavior: For the GUI:

1. Go to Train
2. Load traning data, set output directories...
3. Start training and wait for data to be loaded
4. Error is shown in the plot square

Expected behavior I expected the train to start

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Win10

Additional context I have original audios of 1 min and the annotations with start_time and end_time of the bird songs/calls, I created a script to cut them and save them in the specie_name folders.