Solana NFT Minting fails with Phantom Wallet: ‘Failed to simulate the results of this request

I’m trying to mint an NFT using Candy Machine UI v3 on the Solana network, but I’m encountering errors when attempting to confirm the transaction in Phantom Wallet. Here are the details:

Environment:

• Network: Solana devnet
• Wallet: Phantom
• UI: Candy Machine UI v3
• RPC: Helius Devnet RPC

Error messages:

1. “Failed to simulate the results of this request. Confirming is unsafe and may lead to losses.”
2. “There was a problem estimating the fee for this transaction. It may fail.”
3. “Couldn’t fetch network fee”

My .env configuration:

REACT_APP_CANDY_MACHINE_ID= REACT_APP_SOLANA_NETWORK=devnet REACT_APP_SOLANA_RPC_HOST=https://devnet.helius-rpc.com/?api-key= SKIP_PREFLIGHT_CHECK=true 

I’ve tried the following:

• Ensuring I have sufficient SOL in my wallet (devnet mode)
• Checking the Candy Machine configuration
• Verifying the RPC endpoint is working

What could be causing these errors, and how can I resolve them to successfully mint my NFT?

Any insights or troubleshooting steps would be greatly appreciated.
Thank you very much for your help

https://preview.redd.it/sr2ey51cglid1.png?width=434&format=png&auto=webp&s=0d4f51ad832226d439e374d89a0faa6adb33f6ff

Here is the picture of my Wallet when i click Mint button: