Unfortunately, this isn’t an issue that TourneyGo can fix for you. PayPal doesn’t accept some types of debit cards for various reasons. There can be other failure card types like misidentified fraud. The best we can offer you in this case is to ask you to contact PayPal and make a determination of the reason and try to correct it with them.
Sometimes a more simple path is to just use another credit card or setup a PayPal account and link it to your checking account.
We apologize for the issue, but since PayPal is our payment processor we are beholden to their processing policies.