Processing issue on colab, I'm using a custom dataset and during the preprocessing stage, I get the message "Done copying images with prefix frame" but then the cell terminates and nothing happens.

[noureldinabdelalim]

Describe the bug
Processing issue on colab, I'm using a custom dataset and during the preprocessing stage, I get the message "Done copying images with prefix frame" but then the cell terminates and nothing happens.
To Reproduce
Steps to reproduce the behavior:

1. Run the installations indicated
2. Click on preprocess cell with upload your images selected
3. After the images being uploaded the message will appear then cell terminates

Expected behavior
Rest of the messages indicating preprocessing is going as intended.