Can't E-File because box B needs filled on 1099-b

I have completed all of my taxes, to the point that i've already paid for the service and am trying to send the e-file. When I try to file, I get told there is something I need to review and am taken to a page that says I need to fill in the date of acquisition for a particular stock on my 1099. There is already a date in the box they say is empty, but I put a date in the field anyway and hit continue. After thinking for a bit it just send me right back to the same page saying I need to enter a date of acquisition. I have tried to put in the date and continue at least 10 times and am stuck in the same loop.