Since this explorer is database-free, it doesn't natively support address balances & transaction history. However, you can check it in :
https://explorer.nusacoin.org/address/nu1qstzc934k675tg9mdf32n0f7ncwm9qdhatwq6us{
"isvalid": true,
"address": "nu1qstzc934k675tg9mdf32n0f7ncwm9qdhatwq6us",
"scriptPubKey": "001482c582c6b6d7a8b4176d4c5537a7d3c3b65036fd",
"isscript": false,
"iswitness": true,
"witness_version": 0,
"witness_program": "82c582c6b6d7a8b4176d4c5537a7d3c3b65036fd"
}