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: 1905
Hash: 786fc974a9b503b2240707fee7e10503e7150b33d15ce06ea4d590f69494b5fa
Previous block: 7a606200ba5f0998bfef955d3d61d83bd266855374c7687574526a5c9bb454b9
Next block: 7ee9e1e7191609cd7b1ba2e0c4a313170d2963caa6ebded8b371dac65fbf049e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159241
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: d55e1247d5ebeb2eb37862b746a27ff4291283d1f8abab703fd277a2ba8b1462
Median time: 1719159240
Difficulty: 4.656542373906925e-10
Confirmations: 339
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ee4
Bits: 207fffff