Failed to fetch transport zones from NSX. Response = {"status":"failure","statusCode":400,"details":"","result":{"httpStatus":"BAD_REQUEST","error_code":500069,"module_name":"Policy","error_message":"Specified enforcement point path=[\/infra\/sites\/default\/enforcement-points\/default] does not exist."}}VMWare HCX
The HCX is making an API call to NSX Manager /api/v1/infra/sites/default/enforcement-points/default/transport-zones, and the NSX Manager is returning a response that the specified path does not exist, due to an unsupported NSX build.
Note: This can occur if you are using the VMC Cloud build in an on-premises environment, which is not supported.
Please refer to this article Network used as backing for overlay network cannot be extended for more insights.