Last time this happened it was because gocomics started slowly re-doing their website. Each change breaking the bot.

It had finally been stable for so long that I though the game of whack-a-mole was over.

If it happens again, I might look into building a local index of strips, so the bot can be entirely self-contained, without relying on something else to get the right comic for a given date.

A disturbance was felt across the fediverse. But as balance was restored, a wave of relief washed over the users of threadiverse platforms.

I would have noticed sooner or later, but a mention my way will have me looking into it sooner next time.