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/nu1qyl4glsn42ksjumas67njttw7kv3l7nlhacvpwp{
"isvalid": true,
"address": "nu1qyl4glsn42ksjumas67njttw7kv3l7nlhacvpwp",
"scriptPubKey": "001427ea8fc27555a12e6fb0d7a725addeb323ff4ff7",
"isscript": false,
"iswitness": true,
"witness_version": 0,
"witness_program": "27ea8fc27555a12e6fb0d7a725addeb323ff4ff7"
}