I deployed the lex bot using https://aws.amazon.com/blogs/machine-learning/deploy-a-web-ui-for-your-chatbot/ this method.
I am getting the message:
"Sorry, I was unable to process your message. Try again later."
when I type some text, and in console when I checked I got status code 404 and response:
{"message":" ... is not a valid BotId/BotAliasId combination."}.
My lex bot and lambda function was in Singapore region and i was deploying it in Ireland. I deployed it in singapore and error was gone. But, new error was not able to see the image response card sent from the lambda function :(