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: 1622
Hash: 047339964cde67cfe1ffb3fd3aa4944a8d98dbbf98574f4918c83cbe2ded2ef7
Previous block: 50ec08b123a0400aeafaaf2c0c1fbf50f1fd938cfb1ce82aafbc846fe041460e
Next block: 42769dbc192a193906b20f671930f75279619b0490e73ee3a050e6a2e5c7ba91
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159194
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 565560195fbac9a0a78cd11a00860c3a80443232f69493b2e6dbef8d43d4498f
Median time: 1719159193
Difficulty: 4.656542373906925e-10
Confirmations: 622
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cae
Bits: 207fffff