Forge Broken

I tried using the reanimator B deck, which reminds me of the Graveborn deck that I purchased a few months ago. When I try to use Animate Dead, it says attaching to creature card in a graveyard. All fine there. Then once it attachs to the creature card in the graveyard, it doesn't bring it out onto the battlefield. Same thing is happening for the computer cause I watched it trying to use Animate Dead as well. Also, I recreated my Graveborn deck that I currently updated and use in real life, on the deck editor and it is also having trouble with Dance of the Dead, which is an enchantment card that is similar to Animate Dead but the creature comes into play tapped with a +1/+1 counter and doesn't untap unless you pay 1B. Both of these enchantments are not working correctly as they should. They should attach to a creature in a graveyard and then come onto the battlefield under your control.
Thanks for your time.
Thanks for your time.