Do I still need to check the checkbox with BIP39?
I tried to do it many times now, no success!
If all you did when creating the wallet was:
Standard Wallet -> Create a new seed -> Legacy -> Wrote down the seed -> Confirmed the seed.
Then, it's very unlikely that this has anything to do with a particular derivation path which isn't the Electrum's default.
In any case, if you still want to try this, check "BIP39" in the "Options" button, press Next, then select "legacy (p2pkh)" and try a different derivation path, e.g: m/44'/0'/1'
edit:
He says he has an electrum seed so why are you all telling him to restore as bip39? It's not a bip39 seed!
Emphasis on:
1. "it's very unlikely"
2. "In any case, if you still want to try this"