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: 261
Hash: 54e551e1486cb219da2416d8dc71a25c69dea8c7075ddd6b33821e433295c04d
Previous block: 2dc02add355135b799c9b9316b56783fa9c31b5c474627ba744048ab0f7bcc44
Next block: 650e15e82a4697ce18459fe47759ead2e89e0e62a26a38e5cef843967aaa66ba
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597911
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 51d3221f2e3bbd947899277030f1648eb93389a5261a80e9ec5388b1a8cd4310
Median time: 1701597910
Difficulty: 4.656542373906925e-10
Confirmations: 1983
Chainwork: 000000000000000000000000000000000000000000000000000000000000020c
Bits: 207fffff