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. mkrgsKuFE

Height: 1591
Hash: 4d0d30df96260d5dba8a84c8f9fe7812f0a801832bd7298366c97cc1c905b97e
Previous block: 17a0ff427081b79f6264f0352991921cf8bcf13cf0ff7aef4f82bf692772614a
Next block: 304db86311fc7a70e257ebff13a9adcfd5c9b6198dc9c24879bc08e93401afae
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932135
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 22a6772f570b1c4a8c045ab01d06083d91a819739f451939f36b63c5ed64e3a4
Median time: 1708932134
Difficulty: 4.656542373906925e-10
Confirmations: 18
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c70
Bits: 207fffff