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: 1579
Hash: 67f7423eba5bb69b5b893639f9a2a456a808ab2a36e2a40c912711f59dd37da3
Previous block: 3934a8db09e61b83875037470897d1d677cf0be3508ad3a169a8daa05ea6017b
Next block: 7b6cbbb6501b768ba9216e7b9f1e2ef7d1e519cc2869424b166d9021bd9f7a49
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697671
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: eac3f35e5d5723125bdad7a2dc6408c6443262ba815c0b42b97104bf2fe2ddc8
Median time: 1718697670
Difficulty: 4.656542373906925e-10
Confirmations: 665
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c58
Bits: 207fffff