After a router swap, hosts get only link-local IPv6 addresses

The branch router R1 was replaced last night with a new IOS-XE router and its config was rebuilt by hand. IPv4 works. But every laptop on the user LAN now shows only an fe80:: address, no 2001:db8:acad:30::/64 address and no IPv6 default route. Before the swap they had both. GigabitEthernet0/0/1 on R1 is configured with ipv6 address 2001:db8:acad:30::1/64 and ipv6 address fe80::1 link-local.