I'm sorry to hear that.
As a premise, I do not have Animbot, so make sure it is not reproducible.
In my case, when this happens, I first save the data and do a backup of the preferences, then delete the old preferences folder.
If this fixes it, you know that Maya has a bug or something that causes cannot import Animbot.
If it still does not work, I suspect there is a problem with the Animbot. So I think the quickest thing to do is to get support from Animbot since you bought Animbot. This is the best way to be sure.
If Animbot suggests a solution and you are able to solve it, please contact us through this post. This way we can help the community. I hope this helps.
Bests,
