Getting error message: The intent named 'IntentName' in bot 'BotName' is not allow listed for explicit next actions. Remove any explicit next actions from the intent and try your request again.

I suddenly started getting an error when I try to Build a LexBot that's been working previously. I made a small change to the custom Payload response that should not have affected performance of the bot.

The message I'm getting is: "The intent named 'IntentName' in bot 'BotName' is not allow listed for explicit next actions. Remove any explicit next actions from the intent and try your request again."

I removed the Intent and re-added it and it worked until I added a Custom Payload. Once I added the custom payload, I continue to get the error, even if I remove the Custom Payload from the intent and just go back to a single text response.

I haven't made any other changes to the Lex bot or to IAM permissions or to any other intent.

I've searched high and low in the documentation as well as on Google at large and I can't find anything to point me in the direction of what to correct. I can't even find an inkling of where to modify or remove any explicit next actions from the intent.