Unable to process return

I am unable to submit a return despite still being in the 14-day time frame. I have included a screenshot of the error message. This has been occurring for 3 days now. I have also submitted a support ticket but I fear that a response will only be received after the 14-day period, seeing that I have 2 days left and they state that responses may only be delivered 72 hours or later. Any help would be greatly appreciated.