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: 1277
Hash: 78a7f455e0adfbf46a323720e56318be27b6dd1320d49c07fbdcf5da2009a32b
Previous block: 4c433fad7814e4645c3a7d82422377a7bbdf0c98abcc2ff691e38e55c239797d
Next block: 3ff3da1c3cde6b27534eb92112767d627ddc81a54775032856ae41a55a1fc8b2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697620
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 08881ab64cfc52d29d999a879fc01c2337928ce3b00e8fb08657c992e0037be1
Median time: 1718697619
Difficulty: 4.656542373906925e-10
Confirmations: 967
Chainwork: 00000000000000000000000000000000000000000000000000000000000009fc
Bits: 207fffff