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: 1223
Hash: 0a044d077f2132ebbf79ebafd6525d78206cf1ad206ebe82c0d6faec3afa0fb1
Previous block: 2183a176af73bfe6cd3abbdf3a1805ac76af5c760ad71a9313a3276b750bb56c
Next block: 50966553d091b53034e21abcfd2363b6c2d86873f870ecf3f5bee979f11fabcc
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697611
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: bd2532b8dc3ef3b0ebabc3936a9bfd64e18448c1a635feedd0ecb6332a49ffbe
Median time: 1718697610
Difficulty: 4.656542373906925e-10
Confirmations: 1021
Chainwork: 0000000000000000000000000000000000000000000000000000000000000990
Bits: 207fffff