There is another tool that you can use to brute-force the wallet passphrase it was developed by Coding Enthusiast.

You can check that tool from his thread below

- https://bitcointalk.org/index.php?topic=5214021.0

Once you downloaded it just go to Missing Mnemonic Passphrase and try to brute-force your wallet just make sure that you remember some parts of your passphrase to speed up the process.