If Solflare shows a swap as failed with no reason, first check the transaction on a Solana explorer to see the on-chain error, as Solflare sometimes doesn’t display detailed failure messages.
Most failed swaps are caused by slippage limits, insufficient SOL for fees, or temporary liquidity issues in the swap pool.
Make sure you keep extra SOL in your wallet beyond the swap amount, since swaps require multiple instructions and higher fees than simple transfers.
Try increasing the slippage tolerance slightly and repeat the swap during lower network congestion.
If the swap route used a DEX like Jupiter or Raydium, the failure may be due to rapid price movement or an exhausted liquidity pool, which resolves by retrying later.
You can also try swapping directly on the DEX’s website using the same wallet.