When you have a problem with a model, before reaching out to the humans for it one great option is to use this Sanity Checker program created by the user formerly known as Ghostwolf.
According to this checker, your models each have the same 9 errors. Items marked in red as "errors" in this way are issues that will probably prevent the model from loading inside of Warcraft 3. Other stuff like "warnings" and lighter colors that are not red are sometimes speculative and might be indicative of a potential problem but might be passable and not a major problem.
But as it stands currently, there's what we might call a "bug" in the Retera Model Studio program that it happily saves EventObjects (EVTS) chunks that are effectively empty by writing 0 keyframes/tracks/timestamps whatever you want to call them for playing the event. And we can save and load that and generally make sense of what it means, but if we put it into Warcraft 3 the game refuses to load the model for some reason. It's conceivable that someone could patch Retera Model Studio so that if you have empty EVTS data in the model when you try to save, maybe we could nuke that data and erase them entirely. But for the time being, the user needs to go and delete them.
From a high level, the problem comes from the animations that you are deleting, such as a "Walk" animation that leaves footprints on the ground. Retera Model Studio will delete the timestamps when we would have spawned the footprints along with deleting the animation, but the automation to actually remove the "Footprint" spawner object entirely is missing, and so you end up with this empty dud object that makes the model fail to load.
But if you click on the "Footprint" spawner event objects in the 2D space, and use the DEL key to delete them entirely, then save the model again, it will happily start loading in the game after this.