AssertionError: train: No labels found in /content/Data/Train/Images.cache, can not start training

[sai-kiran7]

I am having '.png' images with labels in '.txt' extension .I am unable to figure out the reason behind this error.Any lead would be helpful.Thank you

This is my data.yaml

train: /content/Data/Train/Images
val: /content/Data/Val/Images
test: /content/Data/Test/Images

nc: 3
names: ['inclusion', 'Fusion', 'Poracity']

This is one of the sample labels file:
0 0.41636317959822383 0.4957207471157267 0.09140585327148437 0.0318857421875
0 1.8298234442327366 0.45094731881869504 0.07210107421875 0.0521126708984375
0 2.0042757524814525 0.35955784852466194 0.0214161376953125 0.0149913330078125