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: 641
Hash: 139bd4ccff0dae9e4d72b9ab0cfbd9c348f5f3ceb1fc378aecad74d97c209838
Previous block: 61411a290e1961fee10ed0be6212ea9352ea449772f44c1f81edc3b98d1c61ba
Next block: 749496cc784bebd08164dcd4b95b1d3ae549491741c79a0ca7173e48f8a4eb90
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864250
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 4d61b61f7a3a20a2b37755980b24b8cdb9ed579657c9a7e49095b5f0ca144612
Median time: 1701864249
Difficulty: 4.656542373906925e-10
Confirmations: 1603
Chainwork: 0000000000000000000000000000000000000000000000000000000000000504
Bits: 207fffff