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: 2502
Hash: 01676fbfb648237f7806d60bb2071a30b68b66e14915d7b8144b6b1a0e75ceeb
Previous block: 641a832017cf60874e8f6d92ff7b12b16178900db33a89adf9a0f547c62d95fc
Next block: 6f1df86e88176712106c6bf322338cc211edc6a18ae3475e19b748bdc018ba77
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847304
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: ad042aae5b8d68fb4629f70da5a121a227357c7be8b7bf3c40e66724360c2965
Median time: 1743847303
Difficulty: 4.656542373906925e-10
Confirmations: 141
Chainwork: 000000000000000000000000000000000000000000000000000000000000138e
Bits: 207fffff