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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1291
Hash: 7bc871ac66e9dda19906eb28b08474fd4a548d3c33fddf41c656ec55aa01c33c
Previous block: 66a2dd952aca838512bcccdcea9ca847415e63d4055e9d2f0d5daff7912af143
Next block: 4b80448eaf5aa37dd0dcd691ed7755364516fc2428cf1b9b7739c899da4b2488
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697623
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 76577ebd7528c18301d15146dbc4134a5494f1ac90338a17bc20925fecaa4c01
Median time: 1718697622
Difficulty: 4.656542373906925e-10
Confirmations: 953
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a18
Bits: 207fffff