The error indicates that there may be some issues with authorization from PayPal.
Make sure there is enough funds on your PayPal account, especially if you paying with different currency, PayPal will autoconvert it to USD which may be less or more depending on your primary currency.
The other possible reason is if your PayPal account is Unverified they will place a limit for monthly transactions (but the value is not so low so this is unlikely the reason).