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: 1422
Hash: 302965595b6e8ea755c74271cf3fec63044d5121b5ddf7b32e1c1fa0c518229c
Previous block: 5d8cb7252c9b154a9c74a1ed85fcc6a5a8d9f026b1a17edc7935e2f21afeee3d
Next block: 68d8d51af0de1f77ee94251a8ec89b27a800302dfc66d2ffeaf96a5a2a923cd9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697644
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1c13b49741c11bd1053626c551c01e47f328512679371e57e5af833dcdbabe6f
Median time: 1718697644
Difficulty: 4.656542373906925e-10
Confirmations: 822
Chainwork: 0000000000000000000000000000000000000000000000000000000000000b1e
Bits: 207fffff