I have only one address which I imported from blockchain. No I don't receive any transactions from faucets or mining pools
So you have Electrum wallet with only one private key which you import from blockchain.com wallet, which means you do not have seed words, is that correct? But since you use that wallet for one year you made some transaction or not?
Something is obviously wrong with that specific wallet, and since you can not fix it in any usual way, only thing which would be advisable to do now is clean installation of Electrum. But for that you need to have seed or backup of every private key from your wallet for make full recovery of your funds.
You can see private key of any address from your wallet by click on Address tab - then right click on address - you get private key - copy/paste.
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.