I'm a novice at ML. It says my Monster Vault is full. Can this be increased or cleaned out? If so, how? If I'm in the wrong section, I apologize.

@Werewolf354 If your vault is full, you can buy more slots with gems. I would wait till they go on sale before buying any. Also are you out of space? If you have more habitats that you can buy and/or islands that can be bought you should work on that. Vault slots are really designed for players with LOTS of monsters.

@Werewolf354 Hi and Welcome
you say your new at ml and yet you have the fault this is either a glitch or your not new. the Vault is something you can build at level 70 i believe

Yes, I am new to ML and really don't understand all the ins and outs of the game yet. Nowhere near level 70. I have 2 monsters that I'm trying to place. When I click on the PLACE buttion I get the message that my monster vault is full. I can't hatch these monsters. They are both legendary (I think) and I have an empty legendary habitat. Sorry I'm such a noob.

np, did you follow the tutorial?

@Marianne-van-Es I will check again. Thank you.

mmm maybe a glitch where the game still direct you to vault even when it is not open yet

if you have vault open usually the game offer me to move monsters to it even when i have free space in habitat . so i think just ignore it and don't try to put the monsters there
When you unlock it you will get 1 slot free then you have to pay with gems
you can check this topic for more info
https://forums.socialpointgames.com/topic/3174/does-anyone-have-the-monster-vault-yet-can-you-tell-us-the-costs-etc
and of course our wiki
http://monster-wiki.com/monster-vault/

@Werewolf354
Do you know how to take a screen shot of your hatchery and post it?
Maybe theyre not Legendaries in your hatchery