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: 1664
Hash: 0df391657deb0edc7dee6e61bf25c4d0d35696c823adb08a49f48a87c4c3ab5e
Previous block: 36b947f0e0fa61f8aeb2e85bb7b577d440b24d90b79134f3a63cb3f976ea0b8c
Next block: 782366dc90d04db9199f0b2e643fea9cb271323ec225993d220cfe0b3def44f8
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159201
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: bca58fa7a58ec5dc9e5d64dd6a9de0836b01ebc7637e51ca0f157a11f1c59695
Median time: 1719159200
Difficulty: 4.656542373906925e-10
Confirmations: 580
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d02
Bits: 207fffff