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: 671
Hash: 58c7dbbd706a84d2ab4bbcc386eba98d65e29d1b596444e0f44b43c6106c966a
Previous block: 270e99ec5703e89a58352e258e36dfd41f3dd2fb52d7f960884b6c9d50fc9add
Next block: 553f90f2cc84443a77684c331fd9cbbc50b9534d2a31120a8a6c17d2427ce760
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864255
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 15dded5348fd7d8ce81773c3cfc5675318b96085200298f8d8777409f4ae6ca1
Median time: 1701864254
Difficulty: 4.656542373906925e-10
Confirmations: 1573
Chainwork: 0000000000000000000000000000000000000000000000000000000000000540
Bits: 207fffff