Your node has insufficient outbound liquidity. Use the "Channel Rebalancing" tool found under Network > Liquidity Management .

It is crucial to distinguish between legitimate technological concepts and this type of fraudulent software. There are legitimate discussions in the blockchain space regarding "Flash Loans" (a concept in decentralized finance where assets are borrowed and repaid in a single transaction block) or the Lightning Network (a layer-2 solution for fast Bitcoin payments). However, software like "Flash BTC Transaction 6.3" is unrelated to these innovations. It does not execute code on the blockchain; rather, it manipulates data presentation to deceive users.

For those with more technical knowledge, batch transactions can combine multiple payments into a single transaction, potentially reducing costs and improving efficiency.

is widely identified by security researchers and users as scam software designed to facilitate fraudulent activities or compromise user devices . Summary of the Scam