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: 2345
Hash: 58858cc486aa70b4acc95c7fcc184948e12fee3fe972e3e01a756121f9e90406
Previous block: 3fb16e2279e8c4da382cc68d68196a386fa27315b3ef66e63b283de1bce1c6f2
Next block: 40bf78516a7f2d5c6d3f97505754e9b34da72748329ca93327d58ce5f6f50953
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847277
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: b7b1fdae93c045d34732652444839222b040cd557526505b2308f670584b9f30
Median time: 1743847277
Difficulty: 4.656542373906925e-10
Confirmations: 298
Chainwork: 0000000000000000000000000000000000000000000000000000000000001254
Bits: 207fffff