Much appreciated :)
Thank You So much That's Work for me!

log are here

2019-05-08T11:12:20.365Z - info: Initializing jsreport@2.4.0 in development mode using configuration file: jsreport.config.json
2019-05-08T11:12:20.372Z - info: Searching for available extensions in C:\Cube\10.0.0.19\CubePracticeCoreAPI\JsReports
2019-05-08T11:12:20.398Z - info: Extensions location cache contains up to date information, skipping crawling in C:\Cube\10.0.0.19\CubePracticeCoreAPI\JsReports
2019-05-08T11:12:20.417Z - info: Found 32 extensions
2019-05-08T11:12:20.462Z - debug: Writing extension locations cache to C:\Users\ZUBAIR~1.ALT\AppData\Local\Temp\jsreport\core\locations.json
2019-05-08T11:12:20.466Z - debug: Discovered 32 extensions
2019-05-08T11:12:20.562Z - info: Setting process based strategy for rendering. Please visit http://jsreport.net/learn/configuration for information how to get more performance.
2019-05-08T11:12:20.578Z - info: Using extension handlebars
2019-05-08T11:12:20.590Z - info: Using extension jsrender
2019-05-08T11:12:20.594Z - info: Using extension templates
2019-05-08T11:12:20.605Z - info: Using extension authentication
2019-05-08T11:12:20.705Z - info: Using extension import-export
2019-05-08T11:12:21.191Z - info: Using extension freeze
2019-05-08T11:12:21.199Z - info: Using extension cli
2019-05-08T11:12:21.203Z - info: Using extension express
2019-05-08T11:12:21.673Z - info: Using extension debug
2019-05-08T11:12:21.678Z - info: Using extension tags
2019-05-08T11:12:21.685Z - info: Using extension data
2019-05-08T11:12:21.693Z - info: Using extension fs-store
2019-05-08T11:12:22.426Z - debug: Extension fs-store was disabled
2019-05-08T11:12:22.427Z - info: Using extension authorization
2019-05-08T11:12:22.437Z - info: Using extension child-templates
2019-05-08T11:12:22.447Z - info: Using extension browser-client
2019-05-08T11:12:22.455Z - info: Using extension licensing
2019-05-08T11:12:22.466Z - info: Using extension chrome-pdf
2019-05-08T11:12:22.655Z - debug: Chrome strategy is dedicated-process
2019-05-08T11:12:22.656Z - info: Using extension phantom-pdf
2019-05-08T11:12:22.743Z - info: Using extension version-control
2019-05-08T11:12:23.044Z - info: Using extension reports
2019-05-08T11:12:23.058Z - info: Using extension text
2019-05-08T11:12:23.062Z - info: Using extension base
2019-05-08T11:12:23.067Z - info: Using extension studio
2019-05-08T11:12:23.118Z - debug: studio request logs are enabled (flush interval: 2000)
2019-05-08T11:12:23.121Z - info: Using extension pdf-utils
2019-05-08T11:12:23.372Z - info: Using extension scheduling
2019-05-08T11:12:23.492Z - info: Using extension scripts
2019-05-08T11:12:23.500Z - info: Using extension html-to-xlsx
2019-05-08T11:12:23.815Z - info: html-to-xlsx detected chrome as available html engine
2019-05-08T11:12:23.816Z - info: html-to-xlsx detected phantom as available html engine
2019-05-08T11:12:23.817Z - info: Using extension assets
2019-05-08T11:12:23.839Z - info: Using extension xlsx
2019-05-08T11:12:24.113Z - info: Using extension sample-template
2019-05-08T11:12:24.119Z - debug: Creating samples is disabled
2019-05-08T11:12:24.120Z - info: Using extension resources
2019-05-08T11:12:24.123Z - info: Using extension public-templates
2019-05-08T11:12:24.197Z - info: Creating default express app.
2019-05-08T11:12:24.205Z - info: Token based authentication against custom authorization server is enabled
2019-05-08T11:12:24.274Z - info: jsreport server successfully started on http port: 4002
2019-05-08T11:12:24.284Z - info: Verifying license key free
2019-05-08T11:12:24.287Z - info: Using free license
2019-05-08T11:12:24.299Z - info: reporter initialized

and here is my config file

{
  "httpPort": 4002,
  "allowLocalFilesAccess": true,
  "extensions": {

	"freeze": {
			"hardFreeze": true
	},
    "authentication": {
      "cookieSession": {
        "secret": "<your strong secret>"

      },
      "admin": {
        "username": "admin",
        "password": "password"
      },
      "authorizationServer": {
        "tokenValidation": {
          "endpoint": "http://localhost:51040/connect/introspect",
          "usernameField": "reportuser",
          "activeField": "active",
          "scope": {
            "valid": ["jsreport"]
          },
          "auth": {
            "type": "basic",
            "basic": {
              "clientId": "jsreport",
              "clientSecret": "Cub3M3dic@l8illin9"
            }
          }
        }
      },
      "enabled": true
    },
    "authorization": {
      "enabled": true
    }
  }
}

when i change hardfreeze = true all template disappears in jsreport studio

i am using freeze extension

"freeze": {
"hardFreeze": true
}

when i set hardfreeze =true all templates are disappears

any suggestions