Usually, if you try to play an animation on a creature that doesn't have it, the creature will stand in a statue-like pose without displaying any messages.
I think this message is related to some high-level mod. There's a link to the animation, but the animation itself is missing. I've encountered this type of message when playing an animated cutscene.
Added 3 minutes later
What rider?
That's exactly the pose they get stuck in (riders on lizards). Also, scouts, assassins (happy animation), hydras (but I eventually fixed it), and archangels. Basically, it doesn't work for every other creature. What kind of mapmaker or modder did this to them? I guess I'll have to delete the entire Maps folder. Or is it not just in other people's maps?
Пробуждение зла
Нашествие из Преисподней
Смена эпох
Скачать все кампании одним архивом: Яндекс.Диск Google.Диск
You can download the set of 3 Campaigns (English version) here
Одиночные сценарии Heroes V 3.1:
Незваные гости
Красный кристалл
Синий кристалл
Закат тьмы
Мультиплеерные карты для Heroes V 3.1:
Легендарная война
Сердце вулкана
Передел мира