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. mxMfLjAez

Height: 1669
Hash: 1f620ffaf9e629e133219813bc6d2d820f178ce5c66410645f5377c3eab3714e
Previous block: 28570e18c3e5fa64f3aede858f89adec7d7c4c1dd94b213f9180bed42515841d
Next block: 5f337606d9153be5788db65f89695e9304a4c3b53572578db2f38b093dfe3d1f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159201
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: a38baf3d663a49a84743c867502e0e0779220014099c5dc9386320621a8de507
Median time: 1719159201
Difficulty: 4.656542373906925e-10
Confirmations: 575
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d0c
Bits: 207fffff