Evite - what should i do if it says guest list is already a t full capacity when you try to put in a RSVP

According to Evite FAQs you may have accidentally limited your total guest list size to attend your event, to a certain amount of people. This means that only a specific number of guests are allowed to RSVP "Yes" to your invitation.
Go back into your invitation and click "Manage Invitation." Then go to the "Add Guests" tab and Guest Options and enter the desired number of guests that will attend your entire event, in the "Set Max Capacity for guest list" field.