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: 454
Hash: 5d4bbf0bd0fe183d78e1afc40af7f6b7c2df9427480208c749fd300ecf7bb9a9
Previous block: 0608836e92a1afe7c741d80bf6ba97a2f9eeaafdf211fe8f767bf38fd4d4a1ca
Next block: 6dbdd2084e2754076e1780ad7aae0639316d4d164f24ece80b6dde269039461a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864219
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 9f73e9bde36882a1759fae121fa72ca391d261fe9a44d299b84f098ae722ecdc
Median time: 1701864218
Difficulty: 4.656542373906925e-10
Confirmations: 1790
Chainwork: 000000000000000000000000000000000000000000000000000000000000038e
Bits: 207fffff