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: 834
Hash: 21b3adb0970faa105bb4e8e7109b6694fdb04bfb08c64d21512ca91fb737a42b
Previous block: 34db37600a9c866d148bbd61f3332ccc6148f7d2cc82b1c40b836ab372dc31e9
Next block: 7a45299caad978bba7ed586c688a2a5d3f633791aa2d099d1af8e36e1506af23
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857807
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 2a60df66c6d04907615183324c2c8fb9448c8ee609bcc5c52ab1e7fc14a6015b
Median time: 1707857807
Difficulty: 4.656542373906925e-10
Confirmations: 1410
Chainwork: 0000000000000000000000000000000000000000000000000000000000000686
Bits: 207fffff