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: 187
Hash: 57ff004db079c35cb5ee914d130d7face148a8b93e910cd842b590b0ccc26bde
Previous block: 3393e8739f8789cf3d271a7bc8ddf81b36f121e8a582b78a5153f5798ba94197
Next block: 20fa13640bd0723d9da301ee5c091e3ffb88d77186d15c90377997af01375dde
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074764
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 5cafd76b3dcaa33441fb8812da572295dfc50f4cafa85ae5a5915469be754ad9
Median time: 1544074764
Difficulty: 4.656542373906925e-10
Confirmations: 15
Chainwork: 0000000000000000000000000000000000000000000000000000000000000178
Bits: 207fffff