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: 1734
Hash: 78634a574c5a75abe91a0dea5eefc926d06eaf22ddcf331d2e9e9599d5a2d563
Previous block: 565da696eef32725973036024bac83858b275a550641c761c884a79ed541fbb7
Next block: 61970e82bfef4091e815ee46c9ae96047ba4b9b2db9dabdf4032e04e8f75ee95
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159212
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: b241d03126a88749647a3244acbd9d58f354f5050a9b5721518a5c38b382bef7
Median time: 1719159211
Difficulty: 4.656542373906925e-10
Confirmations: 510
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d8e
Bits: 207fffff