I cannot complete the Animal Transport section of the Animal Husbandry Certificate:

When I move the animals to the Transport Barn, several of the animals are outside of the barn wandering around. When I drive into the animal load trigger with the vehicle, I cannot load the animals. It just shows LOAD - STOP. I've tried opening and closing the doors and start/stop load animals from the radial menu. nothing is working.

Thanks

I was able to complete this mission by:

1: Moving 1 Animal at a time to the Transfer Barn then Loading 1 Animal into the Trailer then repeating for each animal.
2: Unloading all animals from the trailer into the transfer barn (fulfilling the Transfer 5 Animals into the Transfer Barn Requirement). Which resulted in all the animals standing outside of the transfer barn in the middle of the aisle.
3: Reloading all animals into the trailer

A bit buggy, but got it done.