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: 1493
Hash: 379595e764c0982fc1a16cbefd0404f1075ce5dea75630b3271116150eacb91a
Previous block: 6cc03cb23c65c18a0bdea5eef4f148e2c894dc9e5e18754fc3499c6c0a8c61f5
Next block: 0ed82a63b7445242b125591d2154fda0d3aa9ea47ee99eda163767581bc4e100
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697656
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e5f021ffc9bd3d5cca199356290e25d80d417dc744cd74e366b25928f877e446
Median time: 1718697655
Difficulty: 4.656542373906925e-10
Confirmations: 751
Chainwork: 0000000000000000000000000000000000000000000000000000000000000bac
Bits: 207fffff