Issue loading a trained GAN when returning to work another day - CelebA Dataset

Hello. I would really love some help here. I am trying to return to work after training a WGAN model for nearly 7 hours -ish. And each time I try to return to work, I keep getting these same errors and I am having to restart the training process all over again.

Has someone found a fix to this problem? My current ipynb file is larger than 50 Meg and therefore isn’t getting uploaded on Github. So, here is the alternate link to my ipnyb file.

I would be extremely grateful to someone who can offer any advice!
Thank you in advance.

PS: I am using the latest version of fastai package. Running everything on Google Cloud.