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: 1607
Hash: 7425b17b66426fcc4a52862cb9900dc81dd866905ed96c133a252b9c513a7a6b
Previous block: 5ef262c63d4127b4c0d258b4bd932bfe611dea15d39d8c6c38f458b2c36bc70c
Next block: 5d20e988d9d01ba201d358f250c29d14a7224bc956ffca16b11df96c77e3da06
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697675
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 06f7cb9242623dcdf6995dd0974aee945bd04f9011d1573505fa6733374ef0e0
Median time: 1718697674
Difficulty: 4.656542373906925e-10
Confirmations: 637
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c90
Bits: 207fffff