Litecoin balance is empty

Hi, I am using the Litecoin Wallet of Electrum LTC. Today I wanted to open my wallet and my password was not working. A bit strange, because I remembered it well. Anyway, I finally entered my wallet by re-typing the 12-word phrase. When my wallet popped up, it was completely empty. I decided to recover the wallet, but still no balance. Any similar experiences? And what was your solution? Thanks in advance.