I wonder if someone can help. I'm playing with nutshell cashu mint using the lastest version, I'm able to run a mint using the default sats but when i try to enable other units like USD, EUR

I get

cashu.lightning.base.Unsupported: Unit usd is not supported

When trying to run the mint

In my .env file

MINT_DERIVATION_PATH_LIST=["m/0'/0'/0'", "m/0'/2'/0'", "m/0'/3'/0'", "m/0'/2'/0>

# Database (SQLite example)
MINT_DATABASE=data/mint

# ===== LIGHTNING BACKEND (LNBITS) =====
# Backend for each currency
MINT_BACKEND_BOLT11_SAT=LNbitsWallet
MINT_BACKEND_BOLT11_USD=LNbitsWallet
MINT_BACKEND_BOLT11_EUR=LNbitsWallet

# Base LNbits config
MINT_LNBITS_ENDPOINT=https://demo.lnbits.com
MINT_LNBITS_KEY=mykey

# Currency-specific wallets (REQUIRE SEPARATE WALLETS IN LNBITS)
MINT_LNBITS_KEY_USD=mykey
MINT_LNBITS_URL_USD=https://demo.lnbits.com
MINT_LNBITS_KEY_EUR=mykey
MINT_LNBITS_URL_EUR=https://demo.lnbits.com

What else do I need to do to get it working?