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. mzaGu

Height: 572
Hash: 016f6fe42a7177774e7ee3519e8780f1983b94131d7f29b415a771ec3f9c39cb
Previous block: 34cb1aad43ba3a9d90ce0ce345846585e43474bb27186389153b15317ebbc789
Next block: 7a25d873a321d187fcee5d00ed788d636d4a99912652651344fb752ddfec1d4b
Weight: 948
Versionhex: 20000000
Version: 536870912
Time: 1564711424
Stripped size: 228
Size: 264
Nonce: 0
Merkle root: 6cc07dbd98aca75263051190015e6668a05f1a799b9320ed8e80302e4111bd33
Median time: 1564711423
Difficulty: 4.656542373906925e-10
Confirmations: 32
Chainwork: 000000000000000000000000000000000000000000000000000000000000047a
Bits: 207fffff