Hi,
I’m getting “The app you are trying to use does not exist or is unavailable” error when trying to login with Facebook.
Other providers (Google, Apple, Twitter) are working fine.
This issue started around January 18, 2026.
Thanks.
Thanks — I can help. This looks like an error report (Facebook login failing). I’ve summarized what you’ve provided for the support team and included troubleshooting steps and next actions.
Summary (from your report)
Why this usually happens
Immediate troubleshooting steps you can try
What I recommend you send next (optional, only if you’re ok sharing)
Links & resources
If you’d like, I can escalate this to the support team — I’ll include the summary above. If you can attach a console/network screenshot or the init/login snippet, that will speed up diagnosis. Do you want me to escalate now, or will you try the troubleshooting steps and share logs?
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Yes, please escalate to the support team now. Thank you.
Hi @jnskjn ! Did you try all the troubleshooting steps that our bot provided?
As mentioned above, we would like you to share
Hi @holyyy
Yes, I’m using default configuration, not custom.
Here is my Web3Auth initialization code:
import { WEB3AUTH_NETWORK, CHAIN_NAMESPACES, WALLET_ADAPTERS } from "@web3auth/base";
import { EthereumPrivateKeyProvider } from "@web3auth/ethereum-provider";
import { AuthAdapter } from "@web3auth/auth-adapter";
import { WalletServicesPlugin } from "@web3auth/wallet-services-plugin";
const chainConfig = {
chainNamespace: CHAIN_NAMESPACES.EIP155,
chainId: '0x2105', // Base Mainnet
rpcTarget: 'https://mainnet.base.org',
displayName: 'Base Mainnet',
blockExplorerUrl: 'https://basescan.org',
ticker: 'ETH',
tickerName: 'Ethereum',
};
const privateKeyProvider = new EthereumPrivateKeyProvider({
config: { chainConfig }
});
const authAdapter = new AuthAdapter({
adapterSettings: {
clientId,
network: WEB3AUTH_NETWORK.SAPPHIRE_MAINNET,
uxMode: "popup",
}
});
const web3AuthContextConfig = {
web3AuthOptions: {
clientId,
web3AuthNetwork: WEB3AUTH_NETWORK.SAPPHIRE_MAINNET,
privateKeyProvider,
},
adapters: [authAdapter],
plugins: [walletServicesPlugin],
modalConfig: {
[WALLET_ADAPTERS.AUTH]: {
label: "auth",
showOnModal: true,
loginMethods: {
facebook: { name: "facebook", showOnModal: true },
// ... other providers
},
},
},
};
Screen displayed when clicking the Facebook login button
Can you confirm if there is nothing in the Console tab? It is hard to understand what happened if there is no console log.
There is nothing in the Console tab on the main page.
The error occurs directly on the Facebook popup page itself, showing “The app you are trying to use does not exist or is unavailable” - this happens before any response comes back to our app.
The only console log in the Facebook popup is:
This suggests the issue is with the Facebook App ID that Web3Auth’s default verifier (web3auth-facebook-sapphire) is using, not with our integration.
Could you please check if the Facebook App associated with the default Facebook verifier is still active?
Thanks for reporting. I have raised it to the development team and they are looking into it. This should be fixed as soon as possible. In the meantime, I’d request you to please migrate to v10 SDKs, you are on v9 which is set to be deprecated very soon.
