[BUG] Flashbots Relayer [SEPOLIA]

i have signed as per the docs and sends requests but it returns error

> [ETHEREUM] Bundle Result: {
> "jsonrpc": "2.0",
> "error": {
> "code": -32600,
> "message": "signature is required"
> },
> "id": null
> }

before it was different error
```
[ETHEREUM] Sending simulation request to https://relay-sepolia.flashbots.net...
[ETHEREUM] Bundle Result: {
"jsonrpc": "2.0",
"error": {
"code": -32000,
"message": "rpc call eth_callBundle() on http://sepolia-bundle-simulation.internal:8545 status code: 502. could not decode body to rpc response: invalid character '<' looking for beginning of value"
},
"id": 1
}
```

and before that it was different can you please check