Help me generating genesis block

[rs3+]

Hello, i'm trying to fork novacoin, but i'm having problems generating genesis:
when started i got

Code:

novacoind: main.cpp:2807: bool LoadBlockIndex(bool): Assertion `block.hashMerkleRoot == uint256("0x")' failed.

I looked into log and it doesn't have merkle and genesis.

Can you help me?