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: 1893
Hash: 125774db02564248fff8d4fa3dbd55b42c16aeb0dd28285647d3a7a8fb44febc
Previous block: 4f73e63c501be7525cdceb59385d20152b589304f1e9c970b15abf75b3ffaf82
Next block: 7860416084ca6aec1eea38bcaebe9db3df88ddd62f6e286f5bf2464f885b627f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159239
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 24bf98d45b3c862b93a6f8ba16f8b8c989f0a1a51a911fb28547d5c5f0e25ed6
Median time: 1719159238
Difficulty: 4.656542373906925e-10
Confirmations: 351
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ecc
Bits: 207fffff