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: 1968
Hash: 6aad9d4bd1b1148e145aa00d36b3fabc3a8c4e13eb8f7d65e0cba33eb496c4a8
Previous block: 76b9c19e2b513a5516ca750e7a42fd8ad92e6ea4d84a46adbf8fbb14c046af25
Next block: 2c53fb099594b28cbeae30eca1f2cf74d17e5455466405b58d2fabad7447c331
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159251
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 288abf0b95e2eb2299e4b5605df19ecd25f9b4483324ae4975b970dfcf0ea556
Median time: 1719159250
Difficulty: 4.656542373906925e-10
Confirmations: 276
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f62
Bits: 207fffff