genesis.json

{
  "config": {
    "chainId": 101,
    "homesteadBlock": 0,
    "eip155Block": 0,
    "eip158Block": 0
  },

  "alloc"      : {},
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x400",
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",
  "nonce"      : "0x0000000000000042",
  "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00"
}

Using Geth version 1.10.13 I saw this fatal message the terminal output using this config as is:

Fatal: Failed to write genesis block: unsupported fork ordering: eip150Block not enabled, but eip155Block enabled at 0

I added "eip150Block": 0, to the "config" object to resolve this message.

@nathankrishnan thanks it works!