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: 207
Hash: 466ac61419808dc3bfa4bdb620de89d53c8a8e408ffb403b17f64bb4d602c5b3
Previous block: 7b422c598fd0335c83bd7531f6a3a207c84a37c7eda360ab08b61ba0ec5ddcfd
Next block: 749ba259f0b71a44a7b825f21997acd7c36141c4a22afaa7f64cc5dcfcda131a
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1564711363
Stripped size: 228
Size: 228
Nonce: 6
Merkle root: 33b0cabdea1e5434c5990df2007b65bb5888ee2126c5aeef7f3eb0f20f969d65
Median time: 1564711363
Difficulty: 4.656542373906925e-10
Confirmations: 397
Chainwork: 00000000000000000000000000000000000000000000000000000000000001a0
Bits: 207fffff