It’s basically what the title says, i get this error in the output saying asset is not trusted for this place, this also goes to other animations as well.
Probably because the animations are owned by other people
If this is true ask whoever made them to send you a place with the animations loaded in to an animation editor dummy and then save them as your own
Otherwise I don’t know 
Are you logged into Studio?
Yes, i am, i tried this with other places and no it didn’t work.
Personal build servers don’t support loading animations, probably for security reasons.