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: 184
Hash: 090590024a081cbe97b061a0bbea2ec2f579e58e8f35eeecb636a55d647d11b7
Previous block: 452d82d842cb948831c808894452af2f8a82ca0d67ae74c96b09492a303cb739
Next block: 4eb7d72c389ac14861c74fdbffb58f3f0a6b7dac80b5075695a58ab733d675b3
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074764
Stripped size: 228
Size: 228
Nonce: 1
Merkle root: 10c067aa076d1bde5c1db67bf8b3bc67712bd47313f6b1c514fc01d9a8e0c3c1
Median time: 1544074763
Difficulty: 4.656542373906925e-10
Confirmations: 18
Chainwork: 0000000000000000000000000000000000000000000000000000000000000172
Bits: 207fffff