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Troubleshooting

"Transaction simulation failed: Error processing Instruction 1: custom program error: 0x1"

This problem happens when you don't have enough extra SOL to pay for the transaction costs and rent for creating a new scnSOL token account. Try leaving ~0.1 SOL in your wallet instead of using all your SOL.

When I click "Approve", the transaction does not go through.

Are you using the Ledger hardware wallet (Ledger Nano X/Nano S)? If, so, you need to enable blind signing.
Solana (SOL)
Ledger Support
Ledger Live documentation
Before sending tokens on the Solana blockchain, make sure you have enabled blind signing in the Solana app settings.
To enable blind signing:
  1. 1.
    Connect and unlock your Ledger device.
  2. 2.
    Open the Solana app.
  3. 3.
    Press the right button to navigate to Settings. Then press both buttons to validate.
  4. 4.
    In the Blind signing settings, select Yes by pressing both buttons.