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: 1586
Hash: 57c4cfe1c7ce7dc61304434084327bceb851a6063eb3dd8a60c47795945a4fa6
Previous block: 001e50fdd13948411d534a14c163feecf115d60acde569ef2d6d46e3bf97d8b9
Next block: 398fd890f2a7b94eac2961b91717b85b876f80807d81bb55f47c48340d2c450d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697672
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8af1ffb85a5e12567103100615039969a8c39c1d3f0e7ac01e02fc03bdfeb11f
Median time: 1718697671
Difficulty: 4.656542373906925e-10
Confirmations: 658
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c66
Bits: 207fffff