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: 2023
Hash: 76e4a61153fcded41901dedf2a86062df3aa8f2fe01ac4bb95b72908294e545a
Previous block: 619d15b6c1c53188072f2457f35509b2709501d25b1d8e1e653dba5e3226a9a6
Next block: 387be09ec9c79af2cf1379b705b69d672d69e3fb6ff75a9fa953fb72512bd7c5
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964774
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: a2fe5bff6d4323ec6dead756fd612a2da5ed27395c1360d8d127e572b71427d0
Median time: 1728964773
Difficulty: 4.656542373906925e-10
Confirmations: 221
Chainwork: 0000000000000000000000000000000000000000000000000000000000000fd0
Bits: 207fffff