SPFx: Problem with loading schema in manifest JSON

Question

I'm having problem with loading $schema in SPFx within my new web part for SP. Web part is working on benchmark.aspx but my whole manifest is not being processed so I can't set preconfiguredEntries and it's big problem for me.

error is: Problems loading reference 'https://developer.microsoft.com/json-schemas/spfx/client-side-manifest-base.schema.json': Request vscode/content failed unexpectedly without providing any details.(768)

Any idea on this issue please?

{
  
  "$schema": "https://developer.microsoft.com/json-schemas/spfx/client-side-web-part-manifest.schema.json", 
    
  "id": "56dab116-67ba-453f-883d-b7a11690e965",
  "alias": "ReadListWebPart",
  "supportedHosts": ["SharePointWebPart"],
  "componentType": "Webpart", 
  
  "version": "1.0",
  "manifestVersion": "2",

  
  "requiresCustomScript": false,
  

  "preconfiguredEntries": [{
    "groupId": "5c03119e-3074-46fd-976b-c60198311f70", 
    "group": { "default": "Other" },
    "title": { "default": "read-list" },
    "description": { "default": "popis web party" },
    "officeFabricIconFontName": "Page",
    "properties": {
      "vedouci_velke_foto": true,
      "asistenti_pod_vedoucim": false, 
      "nazev_web_party": "To jsme my"   
    }
  }]
}

Answer 1

I checked the manifest.json, will be the same as yours, have the following waring:

Then tested to access "https://developer.microsoft.com/json-schemas/spfx/client-side-web-part-manifest.schema.json" in my local, no problem, still can be accessed.

After this, I tested to output the preconfigured properties in React SPFX Web Part like this:

Props.ts

WebPart.ts

.tsx

Still able to output properties:

In conclusion, you can just igore this issue, it's still able to read preconfiguredEntries.