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: 2021
Hash: 2766fe7a7b0170e0167dc359caf5e8030eb2765e6a38a363aa7d946b1e11d072
Previous block: 581fa6788ef6c8de716fe9cfceeedd8ebfac32c07fa2226b30e1e4992c55587e
Next block: 619d15b6c1c53188072f2457f35509b2709501d25b1d8e1e653dba5e3226a9a6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964773
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 59de685355b1ea7ada17e4b18dcba8c9e4bb1d6caf4e8b405adb3ee67fb2b7fb
Median time: 1728964773
Difficulty: 4.656542373906925e-10
Confirmations: 223
Chainwork: 0000000000000000000000000000000000000000000000000000000000000fcc
Bits: 207fffff