Yes, it's a known bug. It will be a while to be fixed because they are waiting on a dev kit update.

The problem is an upstream incompatability/conflict introduced by the TLC updates and the only solution is to either not tame badass/alpha Argentavis or modify the server config file not to spawn them.

im having the same problem i knocked out a BA Argent but i cant acess its inventory i tried to forcetame it but that didnt work does taming normal argents work???