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: 1408
Hash: 3154ad49509a7bed6ce8eca309c4b6c55fd44b7b99596acd6dc97c377d75f3d9
Previous block: 4e89cfb4fcd973578a6eaea3dfe770f78df7a1d2069e440093cbb5b18b4ecd41
Next block: 3c0da308255ccfd05801e75c227537cb3345a798d16603a8b250de0aee59ccbd
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697642
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 85f51a8722156ca9487e37a75c682822528ec2bc4bf14f82c66300dc855929dc
Median time: 1718697641
Difficulty: 4.656542373906925e-10
Confirmations: 836
Chainwork: 0000000000000000000000000000000000000000000000000000000000000b02
Bits: 207fffff