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 github.com/pdxrod/blockchain_explorer.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 202
Hash: 1cc938c3f2bc3b59130af04264b31548dab69a4d72717619bbb75758390acba9
Previous block: 250e67e1fd78e9646d16faa8f9b55f6ac477ce7146b831e50f1c912af45ee824
Next block: 53929852d700737a22692ef779117c1ab08c3e9c894c73969b07a32b064a8a3b
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1564711363
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 89ba110624e1b80f5d041d234b6ca3a652fd119f785dbb728fbe865fb0a50af3
Median time: 1544074766
Difficulty: 4.656542373906925e-10
Confirmations: 402
Chainwork: 0000000000000000000000000000000000000000000000000000000000000196
Bits: 207fffff