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: 521
Hash: 70aa714251a394ca7599223e605416749a6484c41e8b84a5a86fa6dc83b5375e
Previous block: 75e5d0c39ea6fd34610d63b6b1b7f5d3b049797cbb36838db540b39c23d5e35a
Next block: 17ca3309159860ea546d2a91ebda640988280dda5c4f92fce1317dde08a55f88
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864230
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: cda6561eba3baf91e8b57f4e3dd8ea6380cd981aa7a61d190750bf914804e799
Median time: 1701864229
Difficulty: 4.656542373906925e-10
Confirmations: 1723
Chainwork: 0000000000000000000000000000000000000000000000000000000000000414
Bits: 207fffff