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: 1655
Hash: 3a1277f899409e8ce5d1da920d868856b113c119b22f2a7fdf2fc92f21814fa4
Previous block: 559b69e381fb41c93d363323c0bb21a4eb6855297dd529f415488b3d68493d8b
Next block: 1ba470ca7ddd406444d13bfdf8e07aeba739eb0ad9b8a216beb1a160d5e6898b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159199
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 7c2288f73e30a6c968179e6d42590904a40f6a3cabbeda3f562095f514ddcdb4
Median time: 1719159198
Difficulty: 4.656542373906925e-10
Confirmations: 589
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cf0
Bits: 207fffff