Update app.py

app.py

@@ -44,6 +44,8 @@ def Hf():
             'model' : model,
             'style': style
         })
+        if(req.status!=200):
+            return "an error occurred! ", 500
         for chunk in req.iter_lines():
             yield f'{chunk.decode()}\n'
     return Response(Gen(prompt=prompt,negative=negative,steps=steps,width=width,height=height,scale=scale,style=style,model=model), mimetype="text/event-stream")