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: 1766
Hash: 075e35ba8fe983a72d92a4935186d29c66bae4c2c3338641ff2c392ae974052d
Previous block: 5e1473d2927d5bcdfc0712a769fa1a35b275ca39797199b69af835e7b48f51a4
Next block: 7796436f4242d79bb8678cba3232e536a2ff6aa11912095fda7ff2a350ea86ed
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159218
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 1291938f778fad2b63cffe96c09980ab6ad8f41923e437c9c0692da1cc25d6fe
Median time: 1719159217
Difficulty: 4.656542373906925e-10
Confirmations: 478
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dce
Bits: 207fffff