How to stop assistant "Ending Session / Path Not Connected"

Hey guys, I have built my first knowledge based chatbot and for the most part it works pretty well. It just has 3 blocks, with a Last Utterance loop.

For some reason though, whenever it gets asked a silly question like "What came first, the chicken or the egg" it just ends the chat abruptly, with a "Path Not Connected".

How can I prevent the chatbot from rudely ending the chat with my customers. I just want it to respond with "I'm not quite sure"

I've tried asking it in the Knowledge Base settings not to end the chat, but it just ignores it.