This error occurs despite the account being unlocked + having a positive balance (ElementaryOS .4
Johannes Leander
1

Resolved.

Truffle uses the account on ‘web3.personal.listAccounts[0]’ by default when migrating. I had an old account which indeed was locked when trying to migrate. If you’re having the same issue, try navigation to ‘.ethereum/testnet/keystore’ and place the account you’re working on in the first spot, or delete every other account manually (At your own risk).

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