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: 1721
Hash: 2878f7f09ea9d6b918247c43daacf60fe7fe7034ed2b86298243039042503d28
Previous block: 61555c82b8c96e3a10203be3847727d2ffb2e9dbe63d875b0a19fdec43780096
Next block: 5e40602f84941f71650cce77c99feb236e7a6292f8d5d6afef45f524221c958c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159210
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 04e221b2df46c66a9b1e9b63d9dfed36a0471422926316c1a5ebfe59b6f45805
Median time: 1719159209
Difficulty: 4.656542373906925e-10
Confirmations: 523
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d74
Bits: 207fffff