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: 157
Hash: 44845e55c535a55025abb64eb5256037c5e9cabb0b019069b9f7e4738830137c
Previous block: 450d319f379b3618a73091d6f3630f3244a302d59727b2bfc57c823410a5eea2
Next block: 0575cff4e0f503d437235279a6c411f0e6abb581575cd04ecbdb8be9ecd74183
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074759
Stripped size: 228
Size: 228
Nonce: 1
Merkle root: 7dff09a4f458b0c95187c61d865a26ea8b0a3ae41ffd8cefbbdeee917145c0bd
Median time: 1544074759
Difficulty: 4.656542373906925e-10
Confirmations: 45
Chainwork: 000000000000000000000000000000000000000000000000000000000000013c
Bits: 207fffff