Update app.py

app.py

@@ -13,7 +13,7 @@ class GUI:
         demo.launch()
 
     def process(self, file):
-        ch_list = epub2txt(file, outputlist=True)
+        ch_list = epub2txt(file.name, outputlist=True)
         chapter_titles = epub2txt.content_titles
         title = epub2txt.title
         return gr.Update(