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: 1438
Hash: 0139ce9857a9db282cf2004df2a31d50f68bbccdfd0da632582121a2c79d3394
Previous block: 21c81b7ac73aa2244437e7dd2b96db935abd780a9cfcfde26c8618a9d676737e
Next block: 4b98de8eb9451f0659ba0fc05315ce40026b707fd1f5b345db2e8b6afcbda41d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697647
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8b800ae01a1bd510e66b6c337557fae86e4bf91da43ff5306401a4ad2134cdd5
Median time: 1718697646
Difficulty: 4.656542373906925e-10
Confirmations: 806
Chainwork: 0000000000000000000000000000000000000000000000000000000000000b3e
Bits: 207fffff