Black Screen with "Failed to Load Assets" - Tauri Context Not Available

[vietlubu]

Environment

• OS: macOS (Apple M1)
• Tauri Version: v2
• Bevy Version: 0.17.1
• Browser: Vite dev server at http://localhost:1420/

Description

When running the application with cargo tauri dev, the game engine starts successfully and all Bevy plugins initialize correctly, but the UI shows a black screen with "Failed to Load Assets" error. The browser console shows that window.__TAURI_INTERNALS__ is undefined when trying to invoke Tauri commands.

Steps to Reproduce

1. Create config files:
   • assets/loader.data.toml with GRF configuration

[assets]
data_folder = "./assets/data/"

[[assets.grf]]
path = "assets/data.grf"
priority = 0

• assets/config/clientinfo.client.toml with server settings

[server]
ip = "127.0.0.1"
port = 6900
client_version = 20211103

2. Run cargo tauri dev
3. Application window opens showing black screen
4. Browser shows "Failed to Load Assets"

Browser Console Errors

Uncaught (in promise) TypeError: can't access property "invoke", window.__TAURI_INTERNALS__ is undefined
    invoke core.js:202
    <anonymous> Main.bs.js:21
    
Asset preloading failed: 
Object { RE_EXN_ID: "JsExn", _1: TypeError }
AssetsContext.bs.js:101:17
    preloadAssets AssetsContext.bs.js:101
    AssetsProvider AssetsContext.bs.js:105
    React 13
    performWorkUntilDeadline scheduler.development.js:45
    (Async: EventHandlerNonNull)
    js scheduler.development.js:223
    js scheduler.development.js:364
    __require chunk-BUSYA2B4.js:3
    js index.js:6
    __require chunk-BUSYA2B4.js:3
    React 2
    __require chunk-BUSYA2B4.js:3
    js React
    __require chunk-BUSYA2B4.js:3
    <anonymous> react-dom_client.js:20192

Screenshot

[vietlubu]

Update: using assets from https://github.com/EndurnyrProject/lifthrasir_assets still not working 🤣

[vietlubu]

Need many time to load login screen. Stuck at login screen without UI 😅

[ycastorium]

Weird! I'll check @vietlubu, can you check the output of the devconsole? If you press F12 it should pop up

[vietlubu]

@ycastorium , Yes! that weird. As I check, the UI only show if I select a menu on the menu bar. and F12 now working with me.

In the character select, cannot load sprites, log in terminal is cannot find sprite files. but I checked with GRF editor that file still exist.

# cargo tauri dev
2025-12-09T22:48:07.625587Z  INFO game_engine::domain::world::systems: 🔄 GameState CHANGED to: CharacterSelection
2025-12-09T22:48:07.987285Z ERROR bevy_asset::server: Path not found: /Users/vietlubu/Projects/ragnarok/poc/lifthrasir/src-tauri/assets/data/sprite/인간족/몸통/남/초보자_남.spr
2025-12-09T22:48:07.987307Z ERROR bevy_asset::server: Path not found: /Users/vietlubu/Projects/ragnarok/poc/lifthrasir/src-tauri/assets/data/sprite/인간족/머리통/남/1_남.spr
2025-12-09T22:48:07.987316Z ERROR bevy_asset::server: Path not found: /Users/vietlubu/Projects/ragnarok/poc/lifthrasir/src-tauri/assets/data/sprite/인간족/머리통/남/1_남.act
2025-12-09T22:48:07.987331Z ERROR bevy_asset::server: Path not found: /Users/vietlubu/Projects/ragnarok/poc/lifthrasir/src-tauri/assets/data/sprite/인간족/몸통/남/초보자_남.act

---

After select character I stuck on the connection to Zone server. The server log is normal

# Hercules server log
[Status]: Request for connection of vietlubu (ip: 127.0.0.1).
[Notice]: Authentication accepted (account: vietlubu, id: 2000000, ip: 127.0.0.1)
[Status]: Connection of the account 'vietlubu' accepted.
[Info]: Closed connection from '127.0.0.1'.
[Info]: request connect - account_id:2000000/login_id1:171305269/login_id2:247085451
[Info]: Loading Char Data (2000000)
[Info]: Char load request (150000)
[Info]: Loaded char (150000 - vietlubu):  status memo inventory cart skills friends hotkeys mercenary accdata

test-lifthrasir.mp4

[ycastorium]

hmmmm, Tauri webview is being a pain on MacOS, managed to reproduce it, i think i know how to fix it.

[ycastorium]

@vietlubu I fixed one of the issues, the grey screen. Its kind of hackish because its related to Tauri and WebView on MacOS only, i already reported to them.

The assets issue is another thing, is your data.grf inside the assets folder? Also, can you check if the assets folder is symbolic linked in the src-tauri folder?