try to fix cannot instantiate 'WindowsPath' on your system

app.py

@@ -3,6 +3,10 @@ import gradio as gr
 from fastai.vision.all import *
 import skimage
 
+import pathlib
+plat = platform.system()
+if plat == 'Linux': pathlib.WindowsPath = pathlib.PosixPath
+
 learn = load_learner('export.pkl')
 
 labels = learn.dls.vocab