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: 1507
Hash: 3ed41613fd703b9a56a5e84b503d9d59498da26d0219d6bd29c51f87dc72972e
Previous block: 5aa1c12b62e5e39fa104c7b314aae115c35cd53e7781f32b455b64e99a568402
Next block: 6e48306274bb50ec7d8e5fab0a6ff34c085e54d972c209649374170a87bc6196
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697659
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 8ded1df7d37965cab86319533ae178b063d1c6ad8e926a82054bb6f3030ec6c5
Median time: 1718697658
Difficulty: 4.656542373906925e-10
Confirmations: 737
Chainwork: 0000000000000000000000000000000000000000000000000000000000000bc8
Bits: 207fffff