[Bug] Gatway trait can't be properly deployed

[BinaryHB0916]

Creating a simple application as below:

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: first-vela-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: nginx
          properties:
            domain: testsvc.example.com
            http:
              "/": 8000

Created webservice successfully. But when creating nginx of Gatway it can't be attached properly, errors showed:

[barnettZQG]

Premise:
kubevela/kubevela#2880