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: 1449
Hash: 0aa42ca4772a5d6bedce68961e02d7272cbd43246fd656966551cdc7c58ad1d7
Previous block: 2c1cb30ba2ba7d0039f9dbebd090d5e532fbcd55b4cbba55c0bd52131dcd3fa0
Next block: 6764ac1402c0644934f7f6c729b8ab1f0e9b75bdb141714b8a6cac8542481dc0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697649
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 2749d6a0681e051e75e9edfcd57e6a640069a7feaa9c2867430bf4a2d1d3c6f2
Median time: 1718697648
Difficulty: 4.656542373906925e-10
Confirmations: 795
Chainwork: 0000000000000000000000000000000000000000000000000000000000000b54
Bits: 207fffff