I'm about to lose 0.24 btc (maybe for you thats not much but as a student this is a fortune for me) because the tmp electrum plugin doesn't accept the privatekey that is 100% correct(I checked with bitadress.org, the private key matches with the public key that is in ma transaction text) when I try to refund.
Im fucking frustrated by now, spending more than 8 hours figuring out what might be wrong, can any1 give me a little hand with this one?
Are you using the newest version of the plugin? Did you generate a compressed key or an uncompressed key? Do you happen to have bitcoin-qt installed already and could try that? Are you willing to try a third party site to try and sign/broadcast?