So the 3rd cell which calls "helper.plot_side_by_side([input_images_rgb, target_masks_rgb])" worked? If so what cell was problematic? And was any other notebook giving you an error?
What is happening when it crashes? Is just the notebook telling you that the kernel died? If you can find it, can you send what is printed in the terminal when that happened?
Usually reinstalling is a good strategy, but that is very strange that it would stop working after 30 minutes. What OS do you have (Windows/Linux/Mac)? Can you send me how you uninstalled, reinstalled, and launched it please?
What is happening when it crashes? Is just the notebook telling you that the kernel died? If you can find it, can you send what is printed in the terminal when that happened?
Usually reinstalling is a good strategy, but that is very strange that it would stop working after 30 minutes. What OS do you have (Windows/Linux/Mac)? Can you send me how you uninstalled, reinstalled, and launched it please?