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. mkrgsKuFE

Height: 1598
Hash: 1974ec04513d1b51769ad0a1d015e5887e7eb96f14b34888f813db17b99dde6d
Previous block: 03733eab65e907bbdcce5237214dfd90443d43107c11fb0fbf65b213d15e9fb4
Next block: 745b3901e58b3f7d01d1bdcbd34ddbb91c52795e6b058b1bd71c7a20d385e866
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932136
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: b2b6c2921b6a79549cfc99888e9d2e1a8412a4d3b1e13303a94bfb46b15beca5
Median time: 1708932135
Difficulty: 4.656542373906925e-10
Confirmations: 11
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c7e
Bits: 207fffff