What gameplay feature is this bug affecting?
Breeding/lion generation

What's the issue? Please include any error messages you receive and as much detail as possible.
My lioness "Nyra" was pregnant, and was supposed to give birth today (the pregnancy phase worked correctly and she appeared to be pregnant). In my rollover message, it said that she gave birth to one cub, and gave the id number for that cub. However, when I went to look at the cub, it...wasn't there. Nyra is not nursing, the cub was never generated into existence, and when I enter the cub's id number as given by the rollover message, the cub simply doesn't exist.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
https://www.lioden.com/lion.php?id=794178235013

This is Nyra, I kind of doubt it's her fault though.

794190179223

This is the cub's id as given in the rollover message.

Any screenshots you can provide us with?
I'm not sure how to put images in here (I'm on mobile) but all I have are pictures of Nyra who is clearly not nursing any cubs, and a screenshot of the rollover message that says she gave birth today.

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I honestly don't know. I bred her to my king, Biriku, made sure she had a nest, and then after three days the cub was hypothetically born - yet it just doesn't exist.