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In recent days due to the Electrum being attacked, I upgraded to the latest 3.3.2 Electrum. But now I'm getting the error as seen below:
"the transaction was rejected by network rules. Missing inputs"
I tried picking many different servers and it's giving the same error. It says "missing inputs", but I picked an address with coins in it. So I'm not sure why it would be "missing".

Can you paste the hex txid in a comment or edit your question with the actual text? I don't see a txid that starts with the hex copied from the image (though I might've made a mistake). If the txid doesn't exist, the error is correct and valid since it means that the input really doesn't exist. – arubi – 2019-01-02T18:45:25.573