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

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mressCpnG

Height: 195
Hash: 023f24636488bb126523aa45a1a2ba24932d575404c4b3e90d00a013f99147e6
Previous block: 440e76c1c5696e85e1d132fc80d30e03fa916abe0038e17f829ae544e5deefde
Next block: 584925d01c9571be187c0fae5bf12b55bb0011aa01eaecddedc749600c46296c
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074766
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 0df5ee8c0b79a6c9132aece0600c59f54f2568ddbbd2db8f2a8b30e7b0008c0f
Median time: 1544074765
Difficulty: 4.656542373906925e-10
Confirmations: 7
Chainwork: 0000000000000000000000000000000000000000000000000000000000000188
Bits: 207fffff