[0HN97JT339OQK] Connection error: System.NullReferenceException: Object reference not set to an instance of an object.

[PortusCoin]

[Description]
When running a litecoin pool, using a mining software like cgminer or cpuminer after sucess mining when the miner submit the information error happens:

[2024-12-29 00:30:58.6091] [D] [] [0HN97JT339OQK] [PIPE] Received data: {"params": ["Lexn89hBUJzWkEdpjQaxBVnQeThX3PLeJF", "00000026", "11000000", "67709841", "d5160600"], "id": 8, "method": "mining.submit"}

[2024-12-29 00:30:58.6091] [D] [] [0HN97JT339OQK] Dispatching request 'mining.submit' [8]
[2024-12-29 00:30:58.6091] [E] [] [0HN97JT339OQK] Connection error: System.NullReferenceException: Object reference not set to an instance of an object.
at Miningcore.Extensions.StringExtensions.HexToByteArray(String str) in /home/pool/miningcore/src/Miningcore/Extensions/StringExtensions.cs:line 16
at Miningcore.Blockchain.Bitcoin.BitcoinJob.SerializeBlock(Byte[] header, Byte[] coinbase) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 424
at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShareInternal(StratumConnection worker, String extraNonce2, UInt32 nTime, UInt32 nonce, Nullable1 versionBits) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 375 at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShare(StratumConnection worker, String extraNonce2, String nTime, String nonce, String versionBits) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 762 at Miningcore.Blockchain.Bitcoin.BitcoinJobManager.SubmitShareAsync(StratumConnection worker, Object submission, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJobManager.cs:line 286 at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnSubmitAsync(StratumConnection connection, Timestamped1 tsRequest, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinPool.cs:line 184
at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnRequestAsync(StratumConnection connection, Timestamped1 tsRequest, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinPool.cs:line 423 at Miningcore.Stratum.StratumServer.OnRequestAsync(StratumConnection connection, JsonRpcRequest request, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Stratum/StratumServer.cs:line 200 at Miningcore.Stratum.StratumConnection.ProcessRequestAsync(CancellationToken ct, Func4 onRequestAsync, ReadOnlySequence1 lineBuffer) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 384 at Miningcore.Stratum.StratumConnection.ProcessRequestAsync(CancellationToken ct, Func4 onRequestAsync, ReadOnlySequence1 lineBuffer) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 384 at Miningcore.Stratum.StratumConnection.ProcessReceivePipeAsync(CancellationToken ct, TcpProxyProtocolConfig proxyProtocol, Func4 onRequestAsync) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 287
[2024-12-29 00:30:58.6091] [I] [] [0HN97JT339OQK] Connection closed
[2024-12-29 00:30:58.7073] [I] [] [0HN97JT339OQL] Accepting connection from ::ffff:85.242.25.241:59508 ...

[PortusCoin]

This is the configuration file for the pool, I don't see any mistakes:

{
"logging": {
"level": "debug",
"enableConsoleLog": true,
"enableConsoleColors": true,
"logFile": "",
"apiLogFile": "",
"logBaseDirectory": "",
"perPoolLogFile": false
},
"banning": {
"manager": "Integrated",
"banOnJunkReceive": false,
"banOnInvalidShares": false,
"banOnLoginFailure": false
},
"notifications": {
"enabled": false,
"email": {
"host": "smtp.example.com",
"port": 587,
"user": "user",
"password": "password",
"fromAddress": "info@yourpool.org",
"fromName": "support"
},
"admin": {
"enabled": true,
"emailAddress": "info@yourpool.org",
"notifyBlockFound": true
}
},
"persistence": {
"postgres": {
"host": "127.0.0.1",
"port": 5432,
"user": "miningcore",
"password": "miningcore",
"database": "miningcore"
}
},
"paymentProcessing": {
"enabled": true,
"interval": 3600
},
"shareRecoveryFile": "recovered-shares.txt",
"api": {
"enabled": true,
"listenAddress": "0.0.0.0",
"port": 5000,
"metricsIpWhitelist": [
"127.0.0.1"
],
"adminIpWhitelist": [
"127.0.0.1"
],
"rateLimiting": {
"disabled": true,
"rules": [
{
"Endpoint": "*",
"Period": "1s",
"Limit": 5000
}
],
"ipWhitelist": [
"127.0.0.1"
]
}
},
"pools": [
{
"id": "portus01",
"enabled": true,
"coin": "litecoin",

		"address": "Lexn89hBUJzWkEdpjQaxBVnQeThX3PLeJF",
		"rewardRecipients": [
			{
				"address": "Lexn89hBUJzWkEdpjQaxBVnQeThX3PLeJF",
				"percentage": 1.0
			}
		],
		"blockRefreshInterval": 500,
		"jobRebroadcastTimeout": 10,
		"clientConnectionTimeout": 600,
		"banning": {
			"enabled": false,
			"time": 600,
			"invalidPercent": 50,
			"checkThreshold": 50
		},
		"ports": {
			"3042": {
				"listenAddress": "*",
				"difficulty": 1024,
				"name": "ASIC Mining",
				"varDiff": {
					"minDiff": 512,
					"maxDiff": 10000,
					"targetTime": 15,
					"retargetTime": 90,
					"variancePercent": 30
				}
			}
		},
		"daemons": [
			{
				"host": "127.0.0.1",
				"port": 11332,
				"user": "RPCUSER",
				"password": "RPCPASSWPRD"
			}
		],
		"paymentProcessing": {
			"enabled": true,
			"minimumPayment": 0.5,
			"payoutScheme": "PPLNS",
			"payoutSchemeConfig": {
				"factor": 2.0
			}
		}
	}
]

}

[PortusCoin]

I think the problem is with the mining submit:

[2024-12-29 19:41:28.0710] [D] [portus01] [0HN97JT339OQM] [PIPE] Received data: {"method": "mining.submit", "params": ["Lexn89hBUJzWkEdpjQaxBVnQeThX3PLeJF", "00001d51", "00000000", "6771a5d1", "f9ac0640"], "id":4}

[2024-12-29 19:41:28.0710] [D] [portus01] [0HN97JT339OQM] Dispatching request 'mining.submit' [4]
[2024-12-29 19:41:28.0748] [E] [portus01] [0HN97JT339OQM] Connection error: System.NullReferenceException: Object reference not set to an instance of an object.
at Miningcore.Extensions.StringExtensions.HexToByteArray(String str) in /home/pool/miningcore/src/Miningcore/Extensions/StringExtensions.cs:line 16
at Miningcore.Blockchain.Bitcoin.BitcoinJob.SerializeBlock(Byte[] header, Byte[] coinbase) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 424
at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShareInternal(StratumConnection worker, String extraNonce2, UInt32 nTime, UInt32 nonce, Nullable1 versionBits) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 375 at Miningcore.Blockchain.Bitcoin.BitcoinJob.ProcessShare(StratumConnection worker, String extraNonce2, String nTime, String nonce, String versionBits) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJob.cs:line 762 at Miningcore.Blockchain.Bitcoin.BitcoinJobManager.SubmitShareAsync(StratumConnection worker, Object submission, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinJobManager.cs:line 286 at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnSubmitAsync(StratumConnection connection, Timestamped1 tsRequest, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinPool.cs:line 184
at Miningcore.Blockchain.Bitcoin.BitcoinPool.OnRequestAsync(StratumConnection connection, Timestamped1 tsRequest, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Blockchain/Bitcoin/BitcoinPool.cs:line 423 at Miningcore.Stratum.StratumServer.OnRequestAsync(StratumConnection connection, JsonRpcRequest request, CancellationToken ct) in /home/pool/miningcore/src/Miningcore/Stratum/StratumServer.cs:line 200 at Miningcore.Stratum.StratumConnection.ProcessRequestAsync(CancellationToken ct, Func4 onRequestAsync, ReadOnlySequence1 lineBuffer) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 384 at Miningcore.Stratum.StratumConnection.ProcessRequestAsync(CancellationToken ct, Func4 onRequestAsync, ReadOnlySequence1 lineBuffer) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 384 at Miningcore.Stratum.StratumConnection.ProcessReceivePipeAsync(CancellationToken ct, TcpProxyProtocolConfig proxyProtocol, Func4 onRequestAsync) in /home/pool/miningcore/src/Miningcore/Stratum/StratumConnection.cs:line 287
[2024-12-29 19:41:28.0748] [I] [portus01] [0HN97JT339OQM] Connection closed