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: 1637
Hash: 7f20be65e31b2aff40b29e220cab9472068f741bf4842fe0786d973c358045ce
Previous block: 7b9d5c1482d7b5ad045893b9f9658941b721ad74d1b629a15a2e2d33dfee2c6b
Next block: 2885b1ead60527b42894d5dbea388662f8733c4f269600f23156806229099966
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159196
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ed382dee4581d88bda059e2388bbb086f5277c6a84137e42fd90fb849c305021
Median time: 1719159195
Difficulty: 4.656542373906925e-10
Confirmations: 607
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ccc
Bits: 207fffff