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: 1572
Hash: 13677d7d3bdb9a6bdd9aff79a0d817704eb9138c8a1db6d8137737de70021367
Previous block: 2d9767400a2f1bd0a506f62d6a1ebe8b33d8c8fb38adabec99c81fa8f00901d0
Next block: 678e4067700a139f976ad88373bc74d2bedf3242292e761729ca44d481179a96
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697669
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 843a94e89ad1380e260b4ff1017b944a13ffd90c4d8ff256a63caf1663a389f0
Median time: 1718697669
Difficulty: 4.656542373906925e-10
Confirmations: 672
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c4a
Bits: 207fffff