You may encounter the error "txn version not supported" when trying to send KSM or DOT from your Ledger via polkadot.js


This error is caused by outdated software. To fix this,


  • Makes sure your firmware is updated
  • Update your Ledger Live app to the latest version
  • Update your Kusama or Polkadot app to the latest version - depending on which network you are experiencing this error.

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