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: 1278
Hash: 3ff3da1c3cde6b27534eb92112767d627ddc81a54775032856ae41a55a1fc8b2
Previous block: 78a7f455e0adfbf46a323720e56318be27b6dd1320d49c07fbdcf5da2009a32b
Next block: 2b64e638f849f364a9e0cc84197c6078436bace8ae0498905e20db1540a59d79
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697620
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 5860d85024a8ff8516d46195933445204f6c457f0b80a6fc791fbfe4d6cbb2dc
Median time: 1718697620
Difficulty: 4.656542373906925e-10
Confirmations: 966
Chainwork: 00000000000000000000000000000000000000000000000000000000000009fe
Bits: 207fffff