Update app.py

app.py

@@ -9,8 +9,8 @@ if 'displayChat' not in st.session_state:
     with st.spinner('Setting up plugins...'):
         os.system('mkdir files')
         thishour = str(datetime.datetime.now().hour)
-        if os.path.isfile(os.join(thispath, 'timestamp.txt')):
-            with open(os.join(thispath, 'timestamp.txt')) as f:
+        if os.path.isfile(os.path.join(thispath, 'timestamp.txt')):
+            with open(os.path.join(thispath, 'timestamp.txt')) as f:
                 stampHour = f.readline().strip('\n')
             if thishour != stampHour:
                 os.system('rm -rf files/*')