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: 2504
Hash: 40ccf9a6a78a3a63ae15d8f3fbdffd5c33c604510c2f451fa8ea01407577108b
Previous block: 6f1df86e88176712106c6bf322338cc211edc6a18ae3475e19b748bdc018ba77
Next block: 317a2cadc49295687d4ff540fe7b7f413b380eddb48535a47d3e57383bf22f25
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847304
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: ce729b82d1a0fe70c0586e9a6181002362c1b2a0accc2c8aa5add06b68dd8f4b
Median time: 1743847303
Difficulty: 4.656542373906925e-10
Confirmations: 139
Chainwork: 0000000000000000000000000000000000000000000000000000000000001392
Bits: 207fffff