A few questions to understand the exact topology.
Can you confirm that the layer 3 interface for the new vlan is up on the basement VC using
show interfaces terse
If not, we start with checking this vlan setup
And confirm that the layer 3 interface for the other vlans are also on this same VC in the basement.
If the interfaces are spread among the VC than we need to know how the internal routing is setup
And do devices in the new vlan need to have access ports on the other VC or not.