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: 145
Hash: 5fa96b429289b0eb9009e51b26d2856dbedc79ca4eb089450f95df2a24b25768
Previous block: 6ffefae56998f8418255356af48aa5802e7c3c7f85f89d33093e4772cdf9ebfd
Next block: 0307e1e18187f72cfdc1d75b4675cfa79d121432edf0eed6d30f5973fd81448f
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597891
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: ad0546f073df66167687253ccb83b79e515297e33bd2342b9826ec806931224e
Median time: 1701597891
Difficulty: 4.656542373906925e-10
Confirmations: 2099
Chainwork: 0000000000000000000000000000000000000000000000000000000000000124
Bits: 207fffff