In the case of Aymeric Guillaume: he changed his user name from Aymeric G to Aymeric Guillaume, could that be causing a bug? His email that appears on the app when his guest tries to check in is the same that we have in the yayem system. When the guest selects his name on HOST LAST NAME, his email appears but his name disappears and the guest can't complete the check in. They press NEXT but the NEXT button does nothing.