минор

app/app.py

@@ -264,7 +264,7 @@ async def celCallback(mngr: Manager, msg: Message):
         queue_changed = (call != None)
       if queue_changed :
         _cb = {'caller': msg.CallerIDnum,
-               'all': app.cache['cel_queue_calls'].values()}
+               'all': list(app.cache['cel_queue_calls'].values())}
         if (msg.EventName == 'APP_START'):
           reply = await doCallback('queueEnter', _cb)
         else: