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: 158
Hash: 0575cff4e0f503d437235279a6c411f0e6abb581575cd04ecbdb8be9ecd74183
Previous block: 44845e55c535a55025abb64eb5256037c5e9cabb0b019069b9f7e4738830137c
Next block: 5167796ecfd89ba4c301ed19cc2f8fb8b21438b1170c64566bd04c53f8f197bd
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074760
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 42f278b037a23549f8cf85a290514fb4553b538aad766c2037b5fc586bfbe758
Median time: 1544074759
Difficulty: 4.656542373906925e-10
Confirmations: 44
Chainwork: 000000000000000000000000000000000000000000000000000000000000013e
Bits: 207fffff