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: 1679
Hash: 48017de30b9f60b901733ff734f8739e7dc8cd34c90932936f1773c0a35df757
Previous block: 77d5f49b4f4ea5589b4c134a1bceb558741b983eaff147e7cdede83782c728e1
Next block: 296bf96dcea198c9d2b6631a00d06a2f9dfc5d2e32b89c4a866e1b28097bbac1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159203
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 020f71b02bfaada4251949ca27e17125e10be37bace21beee44989adf065c610
Median time: 1719159202
Difficulty: 4.656542373906925e-10
Confirmations: 565
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d20
Bits: 207fffff