How do I fix "$'\r': command not found" errors running Bash scripts in WSL?

I'm getting an error in WSL while trying to use junyanz/pytorch-CycleGAN-and-pix2pix.

I followed all the install steps successfully on Windows 10 x64 using the steps at PyTORCH on Windows 10: An instructional with screenshots, then Ubuntu for Windows with GitHub desktop How to Install and Use the Linux Bash Shell on Windows 10.

But I'm blocked at the latest steps.

It's where I trying to download or train the model in Windows. Using for example the Ubuntu Linux prompt, I navigate manually to the appropriate place and type a following command like the one below (I also tried in su mode)

bash pretrained_models/download_pix2pix_model.sh facades_label2photo

I get an immediate error, always the same, similar to these:

root@Azure:/mnt/c/Users/vincent/Downloads/vision/pytorch-CycleGAN-and-pix2pix# bash pretrained_models/download_pix2pix_model.sh facades_label2photopretrained_models/download_pix2pix_model.sh: line 2: $'\r': command not foundNote: available models are edges2shoes, sat2map, and facades_label2photopretrained_models/download_pix2pix_model.sh: line 4: $'\r': command not found]pecified [facades_label2photopretrained_models/download_pix2pix_model.sh: line 6: $'\r': command not foundmkdir: cannot create directory ‘./checkpoints/facades_label2photo\r_pretrained\r’: No such file or directorypretrained_models/download_pix2pix_model.sh: line 10: $'\r': command not foundWARNING: timestamping does nothing in combination with -O. See the manualfor details.: No such file or directoryhphotopretrained_models/download_pix2pix_model.sh: line 12: $'\r': command not foundpretrained_models/download_pix2pix_model.sh: line 13: $'\r': command not found

Any idea?