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: 1899
Hash: 338fae7cbc8cacebc06d05cb4f1a58d863b4f735c4656cd965039b9948adf6e9
Previous block: 2adbfc250b0650ffdcec4956453a077605a1a22e7fa71955d9ea8a0e13e31df2
Next block: 142dc3bb052b172e4abe438164c60751edda1e2f266ca3db78effd1eafcbfe3d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159240
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 76e76897ca4bb969e1aad2bd07aae64479b2bfd5b74fd5d25a26e17e82f27770
Median time: 1719159239
Difficulty: 4.656542373906925e-10
Confirmations: 345
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ed8
Bits: 207fffff