TypeError: Failed to initialize preview: Cannot read properties of undefined (reading 'fromJson')

[Gardin233]

Crash report

• Page url: https://misode.github.io/worldgen/noise-settings/
• Generator ID: worldgen/noise_settings
• Current version: 1.18
• Latest version: 25w45a

Stack trace

TypeError: Failed to initialize preview: Cannot read properties of undefined (reading 'fromJson')
    at BJ.loadDensityFunction (src/app/components/previews/Deepslate.ts:298:45)
    at (https://misode.github.io/assets/index-B6XNXgAo.js:381:66956) (src/app/components/previews/NoiseSettingsPreview.tsx:35:33)

Generator JSON

{
  "default_block": {
    "Name": ""
  },
  "default_fluid": {
    "Name": ""
  },
  "sea_level": 0,
  "disable_mob_generation": false,
  "noise_caves_enabled": false,
  "noodle_caves_enabled": false,
  "aquifers_enabled": false,
  "ore_veins_enabled": false,
  "legacy_random_source": false,
  "noise": {
    "min_y": 0,
    "height": 0,
    "size_horizontal": 1,
    "size_vertical": 1,
    "sampling": {
      "xz_scale": 1,
      "y_scale": 1,
      "xz_factor": 1,
      "y_factor": 1
    },
    "top_slide": {
      "target": 0,
      "size": 0,
      "offset": 0
    },
    "bottom_slide": {
      "target": 0,
      "size": 0,
      "offset": 0
    },
    "terrain_shaper": {
      "offset": 0,
      "factor": 0,
      "jaggedness": 0
    }
  },
  "surface_rule": {
    "type": ""
  },
  "structures": {
    "structures": {}
  }
}

In fact, I used the presets JSON and dont change it