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: 2627
Hash: 396705dddd8141b12977095d71f0b92207288004fe87ec5933e6589ada276278
Previous block: 355c88929ce0025cfb399232b660deb77e11f42a42c1c86760fbdebf7d8fbadd
Next block: 026c325ac2c9f7865fc1089922794d3ec1bd7e9a1e03aa322b567b9240792549
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847324
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 513d7d0746a602792cbfdc679f24b3def4dd7e141e89f0ee3454f5af9ca85a71
Median time: 1743847324
Difficulty: 4.656542373906925e-10
Confirmations: 16
Chainwork: 0000000000000000000000000000000000000000000000000000000000001488
Bits: 207fffff