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: 566
Hash: 14aac7aa76d3a848837a164dacdfa4bfdd0343a86628bbfab55de3d7457a3874
Previous block: 13ae25c106ed2c0e3fecd30327e540966697dbc6c2ed4052e7c4b0fbe9cf1f02
Next block: 2873406e00ae89bd8043f2b837b06587d4c16217186617bc65a6657a3614e2ff
Weight: 948
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1564711423
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: b36baf5fe09021b34f30b028f46ad0d1ab5e2bbf79740b75b519d3c06b8f0981
Median time: 1564711422
Difficulty: 4.656542373906925e-10
Confirmations: 38
Chainwork: 000000000000000000000000000000000000000000000000000000000000046e
Bits: 207fffff