Yes I have only one private key which I already have it saved on a txt on my computer. I tried to uninstall electurm , removed It's whole folder which is located on appdata folder , installed it again and imported my wallet private key but still having the same issue.
I can not say why one private key can do such a problem, new created wallet is sync, but wallet with imported private key which is working for the past year, suddenly stops working/sync. Since you make clean install and try all other ways, and it is still not working I recommend you to do the following:
- Make new wallet in Electrum.
- Use standard option/p2wpkh-p2sh(you will get address start with 3).
- Go to your blockchain.com account and send BTC to new Electrum wallet address.
- You will have BTC in new wallet protected by seed as your backup.