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: 1245
Hash: 21ba69beb72cd07e972f153a889e0ca5ce4e65714927dca187b7ee2a3c4138ea
Previous block: 35397953a226dad92b245f3862312dca3669d3c3d90906e8b17b7f63e7aa1703
Next block: 39db2f615956a661b1e95f5441dc062ba0a8925c5db47014bfdb04bec3a289b3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697615
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: f5c962d14f5db839371d8d2837d9b0b2de0dca1582651deeb41004fd2198f07f
Median time: 1718697614
Difficulty: 4.656542373906925e-10
Confirmations: 999
Chainwork: 00000000000000000000000000000000000000000000000000000000000009bc
Bits: 207fffff