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: 562
Hash: 67b8c2727eeccc4526af0033085f3f09030b2b85a85868b9d399f3e18d2346e3
Previous block: 1b110ff1e6d2bde25099fbf605f3f4668d4d3e1265f180824ccda9542d57a959
Next block: 0dfff6dcaf35e61bb134de7cfbeea6e835148d490b2a8f1d6cf70233bae4f5a1
Weight: 948
Versionhex: 20000000
Version: 536870912
Time: 1564711423
Stripped size: 228
Size: 264
Nonce: 1
Merkle root: c5491ed92ccd2152d157003338ba0ec5e4295edbd76471f256c4ef49060413d7
Median time: 1564711422
Difficulty: 4.656542373906925e-10
Confirmations: 42
Chainwork: 0000000000000000000000000000000000000000000000000000000000000466
Bits: 207fffff