error 404 on all challenges

[jbayonnegit]

Hey ! Impossible to access to any challenge on ethernaut : https://ethernaut.openzeppelin.com/404.

[sueun-dev]

fwiw I can't repro this today — levels load fine for me even without a connected wallet (tiles fall back to /level/<number> and that route works), so it's not the site being down.

That /404 is the app redirecting you, not the server. Opening a level tries to match the URL against the loaded game data, and on a miss you get pushed to /404 (client/src/middlewares/activateLevel.js). And with a wallet extension installed, the game data only loads after the eth_accounts / eth_chainId handshake in client/src/index.js — which has no .catch. So if an extension errors there, the homepage looks totally normal but every level click lands on /404.

I'd try an incognito window with extensions off. If it still happens, your network + any console errors would help.