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: 2054
Hash: 1d725e9fa9cda96ce8e3c26c5bce1507bb18f4d09cfedb74b162b822867bcdda
Previous block: 12a0e80695079572025296876121ad4c2447df677014d46b5917e4ff49b923de
Next block: 4e5e3178d255a7285b27879d0c861b2eadbb6e817cc29177fa6483bc5e107d96
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964779
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8a429d6a3ce86bc19857638a4d9ec1ee108ffef7c13f4d491670748f375148d4
Median time: 1728964778
Difficulty: 4.656542373906925e-10
Confirmations: 190
Chainwork: 000000000000000000000000000000000000000000000000000000000000100e
Bits: 207fffff