[Solved] Solana CPI (runtime) invoke fails when creating a new account by system_instruction::create_account (on-chain program with anchor framework)

I realized the issue:

1. I did not pass the system_program into instruction.

pub system_program: Program<'info, System>

2. Need to use invoke_signed to also let pda to sign

invoke_signed(                                                            
            &create_acc_ix,                                             
            &[                          
                self.minter.clone(),
                self.mint_pda_acc.clone(),
            ],
            &[&[ &mint_seed.as_ref(), &[*bump_seed] ]]
        )?;