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: 1390
Hash: 537455761862d8b7dc94bc7772b6979e83000850d616223dbcd42fb0b6481f5d
Previous block: 50360907cf96476e9a41047480790e7a0644335d2004dd217695fb32c60fccfa
Next block: 42613229e8f56d434d75c2ebcecafedc697df1a66823969774b370d7ad8d4184
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697639
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 3d166044317ed039fca5a28406c2a8e5d1f28ba0958fa20d539bedd1c49fb896
Median time: 1718697638
Difficulty: 4.656542373906925e-10
Confirmations: 854
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ade
Bits: 207fffff