Empty plugin list in CRW behind the proxy

spec:
  server:
    proxyURL: 'http://10.0.148.146'
    proxyPort: '3128'
    nonProxyHosts: 'console.ocp311.crw-qe.com'
    customCheProperties:
      CHE_LIMITS_USER_WORKSPACES_RUN_COUNT: '-1'
      CHE_LIMITS_WORKSPACE_IDLE_TIMEOUT: '900000'
      CHE_INFRA_KUBERNETES_WORKSPACE__UNRECOVERABLE__EVENTS: 'Failed Scheduling,Failed to pull image'
  auth:
    updateAdminPassword: false

2021-01-28 15:09:45.064 root INFO [INFO] Plugin registry url is: http://plugin-registry.crw-crwctl-with-proxy.svc:8080/v3  
2021-01-28 15:09:45.415 root INFO Cannot access the registry Params: Error: Request failed with status code 503
    at createError (/home/theia/node_modules/@eclipse-che/theia-plugin-ext/node_modules/axios/lib/core/createError.js:16:15)
    at settle (/home/theia/node_modules/@eclipse-che/theia-plugin-ext/node_modules/axios/lib/core/settle.js:17:12)
    at IncomingMessage.handleStreamEnd (/home/theia/node_modules/@eclipse-che/theia-plugin-ext/node_modules/axios/lib/adapters/http.js:237:11)
    at IncomingMessage.emit (events.js:326:22)
    at endReadableNT (_stream_readable.js:1223:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)
2021-01-28 15:09:45.558 root INFO Unable to read plugin registry Params: http://plugin-registry.crw-crwctl-with-proxy.svc:8080/v3/plugins/