Could you provide some dummy input shapes to reproduce this issue?
I’m currently using this repository with torch==1.4.0, torchvision==0.5.0 and this dummy code, which works fine:
fa = face_alignment.FaceAlignment(face_alignment.LandmarksType._2D, flip_input=False, device='cuda')
x = np.random.randn(224, 224, 3)
out = fa.get_landmarks(x)
> Warning: No faces were detected

It seems you are not using the GPU in your example, so I’m wondering, if the cudnn error is raised by some other code?