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: 1715
Hash: 3b23775aa14b70e99195efdedce537f85e57a6675f12d8f8ec68a83ac4d8b32d
Previous block: 38389aecf7af3240a7a1903d885e9e1bbad5993305d99fb41293c8ed7a18b5e6
Next block: 3a33051adfc99f7a2f0bf249855ace65be74e8dcf076d4437e4dd1f4c871183c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159209
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: f43bc9f8a2cbc1e3df18f656b21803520943ce6131bdadd4d64f490ecbce0e3f
Median time: 1719159208
Difficulty: 4.656542373906925e-10
Confirmations: 529
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d68
Bits: 207fffff