The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1297
Hash: 58c626e684069d1b13b9164b43d893baee45658013eb6c05e25be578e8cd024d
Previous block: 70d8840c239b6567cc732397f288e69aeb740cbb49aacddb7583097b19026c67
Next block: 347499ba627f1e243024f78324efd977e28d38300a093721038bb10b224055aa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697624
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 76a1d4d1843c2609130a27a62ec5256644e1b7503bda9994c4b58bb46d450dfe
Median time: 1718697623
Difficulty: 4.656542373906925e-10
Confirmations: 947
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a24
Bits: 207fffff