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: 1743
Hash: 78a357e6b98d84ee9d4d49cc4a1f5906c16062b85f79a64b7a0ed9548c23d86c
Previous block: 56f71377afcc6c180526d9066b83ac6e841c11b90d4a7c9f1173cf235d9e2300
Next block: 7f89ff2083e91456c323dc26982920a96a00bcb1350216e063d20e7de50c55b9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159214
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e04a73588d156f789349b8977c0594c1a4baba1c5c71c318ba43f0dc1d2d0dd7
Median time: 1719159213
Difficulty: 4.656542373906925e-10
Confirmations: 501
Chainwork: 0000000000000000000000000000000000000000000000000000000000000da0
Bits: 207fffff