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: 1871
Hash: 43411b14545cf306c9b5fbc1b894b85a5a006e3aef412449759873410e55710c
Previous block: 08fb389fb4affff25f90cad25d8246f19b9c1d00708bfa45d14ad4c8249da9fb
Next block: 65fd25b05210eb26c08a3607daf6504dbc06ca114f078a439b10534fa6068a17
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159235
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 0532d6eae264be644483a9c9b8e460cf02f20adb819c677144d6c7fb15b062f0
Median time: 1719159234
Difficulty: 4.656542373906925e-10
Confirmations: 373
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ea0
Bits: 207fffff