Update app.py

app.py

@@ -59,7 +59,7 @@ def plot_ui():
 @module.server
 def plot_server(input, output, session, r):
     @render.plot
-    def plot_prediction():
+    async def plot_prediction():
         fig, ax = plt.subplots()
 
         # ax = plt.Axes(fig, [0., 0., 1., 1.])