Private Key Not Working
Be sure there is not a space at the beginning or end of your private key. We validate based on the number of characters. If you saved another version (for example, the UTC / Keystore file) it may also be worth trying that file as well.
Please be sure that you are carefully and accurately typing your private key. A single wrong character will open a different wallet than is "yours".
Some wallets, like Exodus, may export a private key that begins with
0x. If you remove these two characters from the beginning, you may be able to access your account.
For reference private key looks like this: