When you ask for a new path after using all the paths your plan allows, the conversation now shows a short card: "You've used your allocated generation limit." with the date your allowance resets (or, during a promotion, when the promotional allowance ends) and a Top up button that opens your billing at the top-up options.
The Try again button no longer appears in that case, because trying again could not work until you had a path available. Once you top up or your allowance renews, the card turns into a Generate my path button that picks up the same conversation, so nothing you wrote is lost.