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: 1672
Hash: 15f1dd5b5317d091a03489f497f25b4f6306d7dc0966d9a5d06921ebfefe1b4a
Previous block: 48e0c985a4fe819a5f8f9ae0462a984fe0e14b880c6eb5ce63c91a15e695de1c
Next block: 787dbc19fd998065a503160bef0ae9e9249e0c6b2624d318f3b61ee0598fb63a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159202
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: a7e727e5be630bf7d11568dc6f9e2d67ed98b11dda5af3eb84157028023c326a
Median time: 1719159201
Difficulty: 4.656542373906925e-10
Confirmations: 572
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d12
Bits: 207fffff