electrum transaction rejected 66, Electrum doesn't send

I have 5 plus unconfirmed deals and have been waiting for three days. That's ridiculous, too. I've also set a 140% dynamic transaction fee for electrum.

Electrum is a popular software wallet that works by connecting to a dedicated server. These servers receive a hash of the Bitcoin address in the wallet and reply with transaction information. Electrum wallets are fast and have few resources, but by default, it connects to these servers and can easily monitor users. In addition to Electrum, some other software uses public Electrum servers. By 2019, it is a faster and better alternative to BIP37.

A new repo qtum-electrum-new was built to add qtum-related features to the latest code for Bitcoin electrum.

Electrum Bitcoin Wallet.

Electrum Bitcoin Wallet.

If the transaction fee is too low to enter an empty block, the transaction will be rejected.

B: Electrum server can customize messages to appear in the user's electrum light wallet software, giving hackers a chance to broadcast phishing messages.

Qtum Electrum.

Qtum Electrum.

Qtum Electrum synchronously updates electrum-related code and releases v0.18.9.

In this demo, Electrum developer Chris Belcher shows how to set up and use electrum personal servers.

For each input, if the referenced output exists in any transaction in the pool, the transaction will be rejected.

Both IOTA and DAGs in Avalanche are used to reduce transaction communications and make transactions end-of-life. If, from a node's point of view, a particular transaction is closed, all transactions approved by that transaction are terminated. (IOTA calls this deal Past Cone, and Ancestry calls it Ancestry.) If a particular transaction is rejected (only if the transaction costs the same as other approved transactions UTXO), all transactions that approve the rejected transaction are also rejected. (Avalanche calls this deal Progeny, IOTA call it Future Cone)

I have 5 plus unconfirmed deals and have been waiting for three days. This is ridiculous. And I've set a 140% dynamic transaction fee for electrum.