First time I’ve tried to expand my slots and not have the box there to do it.

Am I missing something? Anyone else encounter this?

Buy some additional vault days first, the option to expand the vault will appear after that.

The expand option is removed once you hit 21(I think) days remaining, so you need to extended before you can expand it.

Thanks, I only want 100 slots for 16 days, I guess I have to wait it out and get 100 for a month or eat the cost and get 100 for 46 days

Vouch this man.
He solves these world problems!

Would be nice if there was a prorated option for partial months

There is, except when the vault is under 21 days it goes away. Which is just odd to me