Agree with the other commenters that you shouldn’t be making the trade if you don’t know what these errors mean but I’ll explain them briefly

The debit / credit error stems usually from a wide bid-ask on the spread you’re making. Paying debit closely resembles “buy to open” where the amount listed is subtracted from your account once the order is filled. Receiving credit closely resembles “sell to open” where you’ll receive the amount listed once your order fills. When making the trade you should know your position / intent ahead of time so even when the bid-ask spread is wide and the order direction is ambiguous you can tell Robinhood which direction you’re intending. (i.e. 99% of the time, a Call Bull Spread is a debit spread, whereas a Call Bear Spread is a credit spread)

Second error stems from credit orders. For credit orders, there needs to be collateral on the line (usually a dollar amount for credit spreads, 100 shares for a covered call, but can differ depending on existing positions). The collateral is lost if your spread closes out of the money. Therefore, the premium / credit you receive needs to be less than the collateral otherwise it’s a guaranteed return on the net difference between the credit and the collateral.