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: 1814
Hash: 64971de98db4b74fc904a5b461aa53abdf30d4e9254f8acfdc0111b6b3250901
Previous block: 6d1555bf5f9d2d41c250a3fcf7c8026b88fde007e17184ff4f887a1001aec8f9
Next block: 6666f854260f880b147146b9baf4abcaad39142193c7b7f2709275fe83163e94
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159226
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 5766af4fd7b6e50aab6e03c4f66206364a6c9994b9b0408d3adfadae85270d4b
Median time: 1719159225
Difficulty: 4.656542373906925e-10
Confirmations: 430
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e2e
Bits: 207fffff