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: 1221
Hash: 65d073716efa9332868f42b70cebcf5aed647459ff0925ad667b0a3a5a331c01
Previous block: 5a322a37b36cd72621099aefbb5d41cc8ee6ebfecb7235a8304b7a58167e4296
Next block: 2183a176af73bfe6cd3abbdf3a1805ac76af5c760ad71a9313a3276b750bb56c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697611
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: bd1092a0700917f01265abc77caaee198d8b7d17fceb4b8acd0162c64618aaa4
Median time: 1718697610
Difficulty: 4.656542373906925e-10
Confirmations: 1023
Chainwork: 000000000000000000000000000000000000000000000000000000000000098c
Bits: 207fffff