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: 1771
Hash: 5fee85a01a27f64e2d62925d7c3f9e0bf41bab8befed51e72c12cf8ddb1e9b67
Previous block: 5e6481888e090bc6e0d8576115253eeee9a4ec13c28235d027a6ea55d2174ef9
Next block: 12742197df762a6611837439fa03afb17896375ad196f019626f8a6362eec2c2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159218
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: e5888cbc848d6ebaf76d200f13f4ea7ab97effa3aa89bebbdefeb07e804ad248
Median time: 1719159218
Difficulty: 4.656542373906925e-10
Confirmations: 473
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dd8
Bits: 207fffff