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: 1801
Hash: 1c570812f5fd63017d39c48e21d579cb21e0ed86a960d5f20e3ecd8f3b0bf8ef
Previous block: 5de15ef3facb3244d87191db06b905554b83a0074d7a6aa1f88595e603a1f463
Next block: 2d99c77590654b0e752dc095b69bde74f75e6164e5d766bdd0944f7e5e30e61c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159223
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1b91d36ca50337f2875731f0b198142fa136a1d6e7664d475a4dadd93b2b7034
Median time: 1719159223
Difficulty: 4.656542373906925e-10
Confirmations: 443
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e14
Bits: 207fffff