coinbase transaction – Bitcoin regtest CPUminer not even beginning

I downloaded CPUminer and tried mining on regtest. Not a single block has been mined and I can see the next error messages. (I modified the problem stage although) I am unable to discover any pages who’ve handled a related drawback like this. Can someone inform me what the difficulty is?

=> bitcoind debug.log file…

2024-07-05T05:37:33Z CreateNewBlock(): block weight: 800 txs: 0 charges: 0 sigops 400
2024-07-05T05:43:51Z Noticed new header hash=00000000ab2d84fe5fdb9e250838c5e7c2751a2cbbec90e23fe75e4e923c8a23 peak=1
2024-07-05T05:43:51Z [error] AcceptBlock: bad-cb-height, block peak mismatch in coinbase
2024-07-05T05:43:51Z [error] ProcessNewBlock: AcceptBlock FAILED (bad-cb-height, block peak mismatch in coinbase)

=> CPUminer terminal log messages…

[2024-07-05 14:43:51] DEBUG: hash <= goal
Hash:   00000000ab2d84fe5fdb9e250838c5e7c2751a2cbbec90e23fe75e4e923c8a23
Goal: 00000000ffff0000000000000000000000000000000000000000000000000000
[2024-07-05 14:43:51] accepted: 0/1 (0.00%), 4953 khash/s (booooo)
[2024-07-05 14:43:51] DEBUG: reject cause: bad-cb-height

$ ./bitcoin-cli -conf=configuration_file.conf getblockchaininfo
{
  "chain": "regtest",
  "blocks": 0,
  "headers": 1,
  "bestblockhash": "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206",
  "issue": 1,
  "time": 1296688602,
  "mediantime": 1296688602,
  "verificationprogress": 1,
  "initialblockdownload": false,
  "chainwork": "0000000000000000000000000000000000000000000000000000000100010001",
  "size_on_disk": 293,
  "pruned": false,
  "warnings": [
    "This is a pre-release test build - use at your own risk - do not use for mining or merchant applications"
  ]
}