Put token failed. status-code: 404, status-description: The messaging entity 'sb://nxpricing-dev.servicebus.windows.net/request-input' could not be found. TrackingId:c67efadd-8f86-4d01-b082-183c7ce27577_G13

I have a python Azure Function running in a container in AKS. 

The function received a message from a queue, and puts a message in another queue back. This is referring to the inbound queue:

fail: Host.Executor[0] 
      MessageReceiver error (Action=Receive, ClientId=MessageReceiver1request-input, EntityPath=request-input, Endpoint=nxpricing-dev.servicebus.windows.net) 
Microsoft.Azure.ServiceBus.MessagingEntityNotFoundException: Put token failed. status-code: 404, status-description: The messaging entity 'sb://nxpricing-dev.servicebus.windows.net/request-input' could not be found. TrackingId:c67efadd-8f86-4d01-b082-183c7ce27577_G13, SystemTracker:nxpricing-dev.servicebus.windows.net:request-input, Timestamp:2019-08-30T06:23:20. 
   at Microsoft.Azure.ServiceBus.Core.MessageReceiver.OnReceiveAsync(Int32 maxMessageCount, TimeSpan serverWaitTime) 
   at Microsoft.Azure.ServiceBus.Core.MessageReceiver.<>c__DisplayClass65_0.<<ReceiveAsync>b__0>d.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
   at Microsoft.Azure.ServiceBus.RetryPolicy.RunOperation(Func`1 operation, TimeSpan operationTimeout) 
   at Microsoft.Azure.ServiceBus.RetryPolicy.RunOperation(Func`1 operation, TimeSpan operationTimeout) 
   at Microsoft.Azure.ServiceBus.Core.MessageReceiver.ReceiveAsync(Int32 maxMessageCount, TimeSpan operationTimeout) 
   at Microsoft.Azure.ServiceBus.Core.MessageReceiver.ReceiveAsync(TimeSpan operationTimeout) 
   at Microsoft.Azure.ServiceBus.MessageReceivePump.MessagePumpTaskAsync()

Any ideas?

thanks!