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: 568
Hash: 5b03d6c77a120c04de9c1ccc0ef99c0a6cd598ba2a67075a56e091b5c40ba2cd
Previous block: 2873406e00ae89bd8043f2b837b06587d4c16217186617bc65a6657a3614e2ff
Next block: 547f39a6352c753e5d17aaabdb63e0f64a86963ec53655ed97e3479f6fa4f48d
Weight: 948
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1564711424
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: 74163c7f45c0ff4703fb537da8effc778eb8c7f0ff49e24c0929c3ee2706421c
Median time: 1564711423
Difficulty: 4.656542373906925e-10
Confirmations: 36
Chainwork: 0000000000000000000000000000000000000000000000000000000000000472
Bits: 207fffff