I have this enabled on the server: [On] Off Allow Flyer Carry PvE By default, flying dinosaurs can't pick up other dinosaurs and players in PvE mode. This allows it.

However it still seems like my argentavis cant pick up any dinos. Any ideas?

even the smallest? if you absolutely cant pick up anything, DL "grab everything" mod and that'll give you an item to put on whichever flyer you want to carry other dinos with. it's an "OP" grade mod, but will most likely let you get past the glitch/bug.