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: 1758
Hash: 5b8ce90b0615bb98f1b81a8e900c55900eb18cad552b778a2682980bd4f2f3df
Previous block: 3b3dd28ac66babd27d685d4684c41f7a4992246574f76cd9cd9afca4c9662a77
Next block: 221515f58ecfdc77a3b77b48bb5a98fd8d8bfdc6e16375975b999dae38a424c4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159216
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 1690d4914c55a4ff5f10db4c8ffd004e2d9cc4bc0158b90fc73969836009b4ae
Median time: 1719159215
Difficulty: 4.656542373906925e-10
Confirmations: 486
Chainwork: 0000000000000000000000000000000000000000000000000000000000000dbe
Bits: 207fffff