Troubleshooting: Wallet Not Connecting, Network Switch Fails, Remix Errors

Here are quick fixes for the most common issues.

Wallet not detected on mobile

• Open the page inside MetaMask’s in-app browser: in the Lab tap “Open in MetaMask,” or paste https://tokentoolhub.com/token-lab/ into the MetaMask browser.

“Switch Network” does nothing

• Click Connect Wallet first, then try switching.
• If MetaMask says the chain isn’t added, approve the “Add Network” dialog.

Remix can’t deploy / no account showing

• In Remix → Deploy & Run, set Environment = Injected Provider – MetaMask.
• Ensure MetaMask is on the same testnet you selected in the Lab.

Out of gas / insufficient funds

• Claim from the testnet faucet linked in the Lab, then try again.

Compiler errors in Remix

• Use Solidity compiler 0.8.x.
• Recreate a fresh file named testtoken.sol and paste the code again.

Still stuck? Revisit the Quickstart: Token Lab Guides • Tool: Token Lab