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: 1263
Hash: 290b3705c19806c254ffbac61fe4c88e27cb3c5c961df6ecb98f8fde6c846a33
Previous block: 1a99ff3298c4abdb29c96a2d679ecf44ef632161548973e8d5c3c8a99818ef3e
Next block: 55de9e18ed110585444fab1ca5a44122e1b92cd4f5d33016dc0d72142a3e379c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697618
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 3351a036818d2dd8fcec41983e17fa487ed90c4c8bd58c0a1a9431301c6dc5e7
Median time: 1718697617
Difficulty: 4.656542373906925e-10
Confirmations: 981
Chainwork: 00000000000000000000000000000000000000000000000000000000000009e0
Bits: 207fffff