Rasa_core.training.interactive - An exception occurred while recording messages

Hi,

I have been trying new interactive learning for core version 0.12.1. Every thing goes well untill i press ‘y’ for a correct prediction posting error screenshot below

I have been trying new interactive learning for core version 0.12.3.Every thing goes well untill i press ‘y’ for a correct prediction posting error screenshot below。How to solve this problem,thanks