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: 1891
Hash: 3552842d42edc1ef430a6bb02f80eaea98dc289eedef64ec81dbfb23bad30f32
Previous block: 2c1165237e2cb45bc81d632515d8a431eac3cb48df54281a6c8559032ff58ec5
Next block: 4f73e63c501be7525cdceb59385d20152b589304f1e9c970b15abf75b3ffaf82
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159238
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 51c2b63b727216152fc47c27f0bd65c936134998fc7efd1751c1816cf2169499
Median time: 1719159238
Difficulty: 4.656542373906925e-10
Confirmations: 353
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ec8
Bits: 207fffff