Visual studio Loading Squidex

hello there, i have this JSON in cloned Squidex test app:

{
  "mode": {
/*
 * Use this flag to set Squidex to readonly, e.g. when you deploy a second instance for migration.
 */
"isReadonly": false
  },

  "urls": {
/*
 * Set the base url of your application, to generate correct urls in background process.
 */
"baseUrl": "http://localhost:53851/",

/*7
 * Set it to true to redirect the user from http to https permanently.
 */
"enforceHttps": false
  },

  "etags": {
/*
 * Set to true, to use strong etags.
 */
"strong": false
  },

  "ui": {
/*
 * Regex suggestions for the UI
 */
"regexSuggestions": {
  // Regex for emails.
  "Email": "^[a-zA-Z0-9.!#$%&’*+\\/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:.[a-zA-Z0-9-]+)*$",
  // Regex for phone numbers.
  "Phone": "^\\(*\\+*[1-9]{0,3}\\)*-*[1-9]{0,3}[-. /]*\\(*[2-9]\\d{2}\\)*[-. /]*\\d{3}[-. /]*\\d{4} *e*x*t*\\.* *\\d{0,4}$",
  // Regex for slugs (e.g. hello-world).
  "Slug": "^[a-z0-9]+(\\-[a-z0-9]+)*$",
  // Regex for urls.
  "Url": "^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w\\.-]+)+[\\w\\-\\._~:\\/?#%[\\]@!\\$&'\\(\\)\\*\\+,;=.]+$"
},

"map": {
  /*
   * Define the type of the geolocation service.
   *
   * Supported: GoogleMaps, OSM
   */
  "type": "OSM",
  "googleMaps": {
    /*
     * The optional google maps API key. CREATE YOUR OWN PLEASE.
     */
    "key": "AIzaSyB_Z8l3nwUxZhMJykiDUJy6bSHXXlwcYMg"
  }
}
  },

  "robots": {
/*
 * The text for the robots.txt file
 */
"text": "User-agent: *\nAllow: /api/assets/*"
  },

  "healthz": {
"gc": {
  /*
   * The maximum number of megabyte that the process can consume until it is marked as not healthy.
   */
  "threshold": 4096
}
  },

  "contentsController": {
/*
 * Enable surrogate keys as headers.
 *
 * Nginx Has problems with long headers. It might make sense to disable this feature if you do not use a CDN.
 */
"enableSurrogateKeys": true,

/*
 * Restrict the surrogate keys to results that have less than 200 items.
 */
"maxItemsForSurrogateKeys": 200
  },

  "content": {
/*
 * The maximum number of items to return for each query.
 * 
 * Warning: Use pagination and not large number of items.
 */
"maxResults": 200
  },

  "assets": {
/*
 * The maximum number of items to return for each query.
 * 
 * Warning: Use pagination and not large number of items.
 */
"maxResults": 200,

/*
 * The maximum file size in bytes. Default: 5MB
 */
"maxSize": 5242880
  },

  "logging": {
/*
 * Setting the flag to true, enables well formatteds json logs.
 */
"human": true,
/*
 * Set to true, to use colors.
 */
"colors": true
  },

  "assetStore": {
/*
 * Define the type of the read store. 
 * 
 * Supported: Folder (local folder), MongoDb (GridFS), GoogleCloud (hosted in Google Cloud only), AzureBlob.
 */
"type": "Folder",
"folder": {
  /*
   * The relative or absolute path to the folder to store the assets.
   */
  "path": "C:/"
},
"googleCloud": {
  /*
   * The name of the bucket in google cloud store.
   */
  "bucket": "squidex-assets"
},
"azureBlob": {
  /*
   * The name of the container in the Azure Blob Storage
   */
  "containerName": "squidex-assets",
  /*
   * The connection string to the azure storage service.
   */
  "connectionString": "UseDevelopmentStorage=true"
},
"mongoDb": {
  /*
   * The connection string to your Mongo Server.
   * 
   * Read More: https://docs.mongodb.com/manual/reference/connection-string/
   */
  "configuration": "mongodb://localhost",
  /*
   * The name of the event store database.
   */
  "database": "SquidexAssets",
  /*
   * The name of the Mongo Grid FS bucket.
   */
  "bucket": "fs"
},
/*
 * Allow to expose the url in graph ql url.
 */
"exposeSourceUrl": false
  },

  "orleans": {
/*
 * Define the clustering type.
 * 
 * Supported: MongoDB, Development
 */
"clustering": "MongoDb",
/*
 * The port is used to share messages between all cluster members. Must be accessible within your cluster or network.
 */
"siloPort": "11111",
/*
 * The ports used by Orleans to connect to external clients. Not used.
 */
"gatewayPort": "40000"
  },

  "eventStore": {
/*
 * Define the type of the event store. 
 * 
 * Supported: MongoDb, GetEventStore
 */
"type": "MongoDb",
"mongoDb": {
  /*
   * The connection string to your Mongo Server.
   * 
   * Read More: https://docs.mongodb.com/manual/reference/connection-string/
   */
  "configuration": "mongodb://localhost",
  /*
   * The name of the event store database.
   */
  "database": "Squidex"
},
"getEventStore": {
  /*
   * The connection string to your EventStore.
   * 
   * Read Mode: http://docs.geteventstore.com/dotnet-api/4.0.0/connecting-to-a-server/
   */
  "configuration": "ConnectTo=tcp://admin:changeit@localhost:1113; HeartBeatTimeout=500; MaxReconnections=-1",
  /*
   * The host name of your EventStore where projection requests will be sent to.
   */
  "projectionHost": "localhost",
  /*
   * Prefix for all streams and projections (for multiple installations).
   */
  "prefix": "squidex"
}
  },

  "eventPublishers": {
/*
 * Additional event publishers (advanced usage only): (Name => Config)
 */
"allToRabbitMq": {
  /*
   * Example:: Push all events to RabbitMq.
   */
  "type": "RabbitMq",
  "configuration": "amqp://guest:guest@localhost/",
  "exchange": "squidex",
  "enabled": false,
  "eventsFilter": ".*"
}
  },

  "store": {
/*
 * Define the type of the read store. 
 * 
 * Supported: MongoDb
 */
"type": "MongoDb",
"mongoDb": {
  /*
   * The connection string to your Mongo Server.
   * 
   * Read More: https://docs.mongodb.com/manual/reference/connection-string/
   */
  "configuration": "mongodb://localhost",
  /*
   * The database for all your content collections (one collection per app).
   */
  "contentDatabase": "SquidexContent",
  /*
   * The database for all your other read collections.
   */
  "database": "Squidex"
}
  },

  "identity": {
/*
 * Enable password auth. Set this to false if you want to disable local login, leaving only 3rd party login options.
 */
"allowPasswordAuth": true,
/*
 * Initial admin user.
 */
"adminEmail": "",
"adminPassword": "",
/*
 * Client with all admin permissions.
 */
"adminClientId": "",
"adminClientSecret": "",
/*
 * Settings for Google auth (keep empty to disable).
 */
"googleClient": "1006817248705-t3lb3ge808m9am4t7upqth79hulk456l.apps.googleusercontent.com",
"googleSecret": "QsEi-fHqkGw2_PjJmtNHf2wg",
/*
 * Settings for Github auth (keep empty to disable).
 */
"githubClient": "211ea00e726baf754c78",
"githubSecret": "d0a0d0fe2c26469ae20987ac265b3a339fd73132",
/*
 * Settings for Microsoft auth (keep empty to disable).
 */
"microsoftClient": "b55da740-6648-4502-8746-b9003f29d5f1",
"microsoftSecret": "idWbANxNYEF4cB368WXJhjN",
/*
 * Settings for your custom oidc server.
 */
"oidcName": "OIDC",
"oidcAuthority": "",
"oidcClient": "",
"oidcSecret": "",
/*
 * Lock new users automatically, the administrator must unlock them.
 */
"lockAutomatically": false,
/*
 * The url to you privacy statements, if you host squidex by yourself.
 */
"privacyUrl": "https://squidex.io/privacy"
  },

  "twitter": {
/*
 * The client id for twitter.
 */
"clientId": "QZhb3HQcGCvE6G8yNNP9ksNet",
/*
 * The client secret for twitter.
 */
"clientSecret": "Pdu9wdN72T33KJRFdFy1w4urBKDRzIyuKpc0OItQC2E616DuZD"
  },

  "news": {
/*
 * The app name where the news are stored.
 */
"appName": "squidex-website",
/*
 * The credentials to the app (Readonly).
 */
"clientId": "squidex-website:default",
"clientSecret": "QGgqxd7bDHBTEkpC6fj8sbdPWgZrPrPfr3xzb3LKoec="
  },

  "translations": {
/*
 * The deepl api key if you want to support automated translations.
 */
"deeplAuthKey": ""
  }
}

when the app is runing on ‘http://localhost:53851/’ this show me “Loading” and not advance.

any sugestions? sory for my BAD English.

Are you running the frontend server as well as described in the docs:

https://docs.squidex.io/development/01-developing